Pharmacy Guide

Patient leaflets and SmPCs, drug interaction checker, official and paediatric dosages, pregnancy and breastfeeding guidance, and NHS pharmacy opening hours — all in one place.

Pharmacy Guide

Patient leaflets and SmPCs, drug interaction checker, official and paediatric dosages, pregnancy and breastfeeding guidance, and NHS pharmacy opening hours — all in one place.

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Posaconazole 100 mg gastro-resistant tablets

Active substance: PosaconazoleRx — prescription only

Source: electronic medicines compendium (emc)
Official leaflet: Read the PIL on emc

What it is and what it is used for

This medicine contains an active substance called posaconazole. This belongs to a group of medicines called "antifungals". It is used to prevent and treat many different fungal infections.

This medicine works by killing or stopping the growth of some types of fungi that can cause infections.

Posaconazole can be used in adults to treat fungal infections caused by fungi of the Aspergillus family.

Posaconazole can be used in adults and children from 2 years of age weighing more than 40 kg to treat the following types of fungal infections:

• infections caused by fungi of the Aspergillus family that have not improved during treatment with the antifungal medicines amphotericin B or itraconazole or when these medicines have had to be stopped;
• infections caused by fungi of the Fusarium family that have not improved during treatment with amphotericin B or when amphotericin B has had to be stopped;
• infections caused by fungi that cause the conditions known as "chromoblastomycosis" and "mycetoma" that have not improved during treatment with itraconazole or when itraconazole has had to be stopped;
• infections caused by a fungus called Coccidioides that have not improved during treatment with one or more of amphotericin B, itraconazole or fluconazole or when these medicines have had to be stopped
This medicine can also be used to prevent fungal infections in adults and children from 2 years of age weighing more than 40 kg who are at high-risk of getting a fungal infection, such as:

• patients who have a weak immune system due to having chemotherapy for "acute myelogenous leukaemia" (AML) or "myelodysplastic syndromes" (MDS)
• patients having "high-dose immunosuppressive therapy" after "hematopoietic stem cell transplant" (HSCT).

What you need to know before you take it

Do not take Posaconazole • if you are allergic to posaconazole or any of the other ingredients of this medicine (listed in section 6).
• if you are taking: terfenadine, astemizole, cisapride, pimozide, halofantrine, quinidine, any medicines that contain "ergot alkaloids" such as ergotamine or dihydroergotamine, or a "statin" such as simvastatin, atorvastatin or lovastatin.
• if you have just started taking venetoclax or your venetoclax dose is being slowly increased for treatment of chronic lymphocytic leukaemia (CLL).
Do not take posaconazole if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking posaconazole.

See "Other medicines and posaconazole" below for more information including information on other medicines which may interact with posaconazole.

Warnings and precautions Talk to your doctor, pharmacist or nurse before taking posaconazole if you:

• have had an allergic reaction to another antifungal medicine such as ketoconazole, fluconazole, itraconazole or voriconazole.
• have or have ever had liver problems. You may need to have blood tests while you are taking this medicine.
• develop severe diarrhoea or vomiting, as these conditions may limit the effectiveness of this medicine.
• have an abnormal heart rhythm tracing (ECG) that shows a problem called long QTc interval.
• have a weakness of the heart muscle or heart failure.
• have a very slow heartbeat.
• have heart rhythm disturbance.
• have any problem with potassium, magnesium or calcium levels in your blood.
• are taking vincristine, vinblastine and other "vinca alkaloids" (medicines used to treat cancer).
• are taking venetoclax (a medicine used to treat cancer).
You should avoid sun exposure while being treated. It is important to cover sun exposed areas of skin with protective clothing and use sunscreen with a high sun protection factor (SPF), as an increased sensitivity of skin to the sun's UV rays may occur.

If any of the above apply to you (or you are not sure), talk to your doctor, pharmacist or nurse before taking posaconazole.

If you develop severe diarrhoea or vomiting (being sick) while taking posaconazole, talk to your doctor, pharmacist or nurse straight away, as this may stop it from working properly. See section 4 for more information.

Children Posaconazole should not be given to children younger than 2 years of age.

Other medicines and Posaconazole Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines.

Do not take Posaconazole if you are taking any of the following:

• terfenadine (used to treat allergies),
• astemizole (used to treat allergies),
• cisapride (used to treat stomach problems),
• pimozide (used to treat symptoms of Tourette's and mental illness),
• halofantrine (used to treat malaria),
• quinidine (used to treat abnormal heart rhythms).
Posaconazole can increase the amount of these medicines in the blood which may lead to very serious changes to your heart rhythm.

• any medicines that contain "ergot alkaloids" such as ergotamine or dihydroergotamine used to treat migraines. posaconazole can increase the amount of these medicines in the blood which may lead to a severe decrease in blood flow to your fingers or toes and could cause damage to them.
• a "statin" such as simvastatin, atorvastatin or lovastatin used to treat high cholesterol.
• venetoclax when used at the start of the treatment of a type of cancer, chronic lymphocytic leukaemia (CLL).
Do not take posaconazole if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking this medicine.

Other medicines

Look at the list of medicines given above that must not be taken while you are taking posaconazole. In addition to the medicines named above there are other medicines that carry a risk of rhythm problems that may be greater when they are taken with posaconazole. Please make sure you tell your doctor about all the medicines you are taking (prescribed or non-prescribed).

Certain medicines may increase the risk of side effects of posaconazole by increasing the amount of posaconazole in the blood.

The following medicines may decrease the effectiveness of posaconazole by decreasing the amount of posaconazole in the blood:

• rifabutin and rifampicin (used to treat certain infections). If you are already taking rifabutin, you will need a blood test and you will need to look out for some possible side effects of rifabutin.
• phenytoin, carbamazepine, phenobarbital or primidone (used to treat or prevent fits).
• efavirenz and fosamprenavir used to treat HIV infection.
• flucloxacillin (antibiotic used against bacterial infections).
Posaconazole may possibly increase the risk of side effects of some other medicines by increasing the amount of these medicines in the blood. These medicines include:

• vincristine, vinblastine and other "vinca alkaloids" (used to treat cancer),
• venetoclax (used to treat cancer),
• ciclosporin (used during or after transplant surgery),
• tacrolimus and sirolimus (used during or after transplant surgery),
• rifabutin (used to treat certain infections),
• medicines used to treat HIV called protease inhibitors (including lopinavir and atazanavir, which are given with ritonavir),
• midazolam, triazolam, alprazolam or other "benzodiazepines" (used as sedatives or muscle relaxants),
• diltiazem, verapamil, nifedipine, nisoldipine or other "calcium channel blockers" (used to treat high blood pressure),
• digoxin (used to treat heart failure),
• glipizide or other "sulfonylureas" (used to treat high blood sugar),
• all-trans retinoic acid (ATRA), also called tretinoin (used to treat certain blood cancers).
If any of the above apply to you (or you are not sure), talk to your doctor or pharmacist before taking posaconazole.

Pregnancy and breast-feeding Tell your doctor if you are or think you are pregnant before you start to take posaconazole.

Do not take posaconazole if you are pregnant unless you are told to by your doctor.

If you are a woman who could become pregnant you should use effective contraception while you are taking this medicine. If you become pregnant while you are taking posaconazole, contact your doctor straight away.

Do not breast-feed while taking posaconazole. This is because small amounts may pass into breast milk.

Driving and using machines You may feel dizzy, sleepy, or have blurred vision while taking posaconazole, which may affect your ability to drive or use tools or machines. If this happens, do not drive or use any tools or machines and contact your doctor.

Posaconazole contains sodium This medicine contains less than 1 mmol sodium (23 mg) per tablet, that is to say essentially 'sodium free'.

How to take it

Do not switch between posaconazole tablets and posaconazole oral suspension without talking to your doctor or pharmacist because it may result in a lack of efficacy or an increased risk of adverse reactions.

Always take this medicine exactly as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure.

How much to take The usual dose is 300 mg (three 100 mg tablets) twice a day on the first day, then 300 mg (three 100 mg tablets) once a day, thereafter.

The length of treatment may depend on the type of infection that you have and may be individually adapted for you by your doctor. Do not adapt your dose yourself before consulting your doctor or change your treatment regimen.

Taking this medicine • Swallow the tablet whole with some water.
• Do not crush, chew, break or dissolve the tablet.
• Tablets may be taken with or without food.
If you take more posaconazole than you should If you think that you may have taken too much posaconazole, talk to a doctor or go to the hospital straight away.

If you forget to take Posaconazole • If you forget a dose, take it as soon as you remember it.
• However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule.
• Do not take a double dose to make up for a forgotten dose.
If you have any further questions on the use of this medicine, ask your doctor, pharmacist or nurse.

Possible side effects

Like all medicines, this medicine can cause side effects, although not everybody gets them.

Serious side effects Tell your doctor, pharmacist or nurse straight away if you notice any of the following serious side effects – you may need urgent medical treatment:

• nausea or vomit (feeling or being sick), diarrhoea
• signs of liver problems - these include yellowing of your skin or whites of the eyes, unusually dark urine or pale faeces, feeling sick for no reason, stomach problems, loss of appetite or unusual tiredness or weakness, an increase in liver enzymes shown up in blood tests
• allergic reaction
Other side effects Tell your doctor, pharmacist or nurse if you notice any of the following side effects:

Common: the following may affect up to 1 in 10 people

• a change in the salt level in your blood shown in blood tests - signs include feeling confused or weak
• abnormal skin sensations, such as numbness, tingling, itching, creeping, pricking or burning
• headache
• low potassium levels –shown up in blood tests
• low magnesium levels – shown up in blood tests
• high blood pressure
• loss of appetite, stomach pain or upset stomach, passing wind, dry mouth, changes in your taste
• heartburn (a burning sensation in the chest rising up to the throat)
• low levels of "neutrophils" a type of white blood cell (neutropenia) – this can make you more likely to get infections and be shown up in blood tests
• fever
• feeling weak, dizzy, tired or sleepy
• rash
• itching
• constipation
• rectal discomfort
Uncommon: the following may affect up to 1 in 100 people

• anaemia - signs include headaches, feeling tired or dizzy, being short of breath or looking pale and a low level of haemoglobin shown up in blood tests
• low level of platelets (thrombocytopenia) shown in blood tests – this may lead to bleeding
• low level of "leukocytes" a type of white blood cell (leukopenia) shown in blood tests – this can make you more likely to get infections
• high level of "eosinophils" a type of white blood cell (eosinophilia) – this can happen if you have inflammation
• inflammation of the blood vessels
• heart rhythm problems
• fits (convulsions)
• nerve damage (neuropathy)
• abnormal heart rhythm – shown up on a heart trace (ECG), palpitations, slow or fast heartbeat, high or low blood pressure
• low blood pressure
• inflammation of the pancreas (pancreatitis) – this may cause severe stomach pain
• oxygen supply to the spleen is interrupted (splenic infarction) - this may cause severe stomach pain
• severe kidney problems – signs include passing more or less urine, that is a different colour than usual
• high blood levels of creatinine – shown in blood tests
• cough, hiccups
• nose bleeds
• severe sharp chest pain when breathing in (pleuritic pain)
• swelling of lymph glands (lymphadenopathy)
• reduced feeling of sensitivity especially on the skin
• tremor
• high or low blood sugar levels
• blurred vision, sensitivity to light
• hair loss (alopecia)
• mouth ulcers
• shivering, feeling generally unwell
• pain, back or neck pain, pain in arms or legs
• water retention (oedema)
• menstrual problems (abnormal vaginal bleeding)
• inability to sleep (insomnia)
• being completely or partially unable to talk
• swelling of the mouth
• abnormal dreams, or difficulty sleeping
• problems with co-ordination or balance
• mucosal inflammation
• stuffy nose
• difficulty breathing
• chest discomfort
• feeling bloated
• mild to severe nausea, vomiting, cramps and diarrhoea, usually caused by a virus, stomach pain
• belching
• feeling jittery
Rare: the following may affect up to 1 in 1,000 people

• pneumonia – signs include feeling short of breath and producing discoloured phlegm
• high blood pressure in the blood vessels in the lungs (pulmonary hypertension) this can cause serious damage to your lungs and heart
• blood problems such as unusual blood clotting or prolonged bleeding
• severe allergic reactions, including widespread blistering rash and skin peeling
• mental problems such as hearing voices or seeing things that are not there
• fainting
• having problems thinking or talking, having jerking movements, especially in your hands that you cannot control
• stroke – signs include pain, weakness, numbness, or tingling in the limbs
• having a blind or dark spot in your field of vision
• heart failure or heart attack which could lead to the heart stopping beating and death, heart rhythm problems, with sudden death
• blood clots in your legs (deep vein thrombosis) – signs include intense pain or swelling of the legs
• blood clots in your lungs (pulmonary embolism) – signs include feeling short of breath or pain while breathing
• bleeding into your stomach or gut – signs include vomiting blood or passing blood in your stool
• a blockage in your gut (intestinal obstruction) especially in the "ileum". The blockage will prevent the contents of your intestine from passing through to the lower bowel – signs include feeling bloated, vomiting, severe constipation, loss of appetite, and cramps
• "haemolytic uraemic syndrome" when red blood cells breakup (haemolysis) which may happen with or without kidney failure
• "pancytopenia" low level of all blood cells (red and white blood cells and platelets) shown in blood tests
• large purple discolourations on the skin (thrombotic thrombocytopenic purpura)
• swelling of the face or tongue
• depression
• double vision
• breast pain
• adrenal glands not working properly – this may cause weakness, tiredness, loss of appetite, skin discolouration
• pituitary gland not working properly – this may cause low blood levels of some hormones that affect the function of the male or female sex organs
• hearing problems
• pseudoaldosteronism, which results in high blood pressure with a low potassium level (shown in blood test)
Not known: frequency cannot be estimated from the available data

• some patients have also reported feeling confused after taking posaconazole.
• redness of the skin
Tell your doctor, pharmacist or nurse if you notice any of the side effects listed above.

Reporting of side effects If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at http://www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects, you can help provide more information on the safety of this medicine.

How to store it

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the blister after EXP. The expiry date refers to the last day of that month.

This medicine does not require any special storage conditions.

Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

Contents of the pack and other information

What Posaconazole contains • The active substance is posaconazole. Each tablet contains 100 mg of posaconazole.
• The other ingredients are: hypromellose acetate succinate, cellulose microcrystalline, hydroxypropylcellulose, croscarmellose sodium, silica colloidal anhydrous, magnesium stearate, polyvinyl alcohol- part hydrolyzed (E1203), titanium dioxide (E171), macrogol (E1521), talc (E553b), iron oxide yellow (E172).
What Posaconazole looks like and contents of the pack Posaconazole gastro-resistant tablets are yellow coloured, capsule shaped, textured, biconvex film-coated tablets debossed with 'MP 1' on one side and plain on other side packaged in a blister in cartons of 24, 48 or 96 tablets or in a unit dose blister in cartons of 24 x 1, 48 x 1 or 96 x 1.

Not all pack sizes may be marketed.

Marketing Authorisation Holder MSN Laboratories Europe Ltd
Invision House
Wilbury Way
Hitchin
SG4 0TY
United Kingdom
Manufacturer Pharmadox Healthcare Ltd.
KW20A Kordin Industrial Park
Paola
PLA 3000
Malta
MSN Laboratories Europe Ltd
Devonshire Business Centre
Works Road
Letchworth Garden City
SG6 1 GJ
United Kingdom
This leaflet was last revised in March 2025.

MSN Laboratories Europe Ltd

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Frequently asked questions about Posaconazole 100 mg gastro-resistant tablets

How do I take Posaconazole 100 mg gastro-resistant tablets?

Posaconazole 100 mg gastro-resistant tablets comes as tablet containing 100mg. Always follow the dose your doctor or pharmacist has given you, and read the leaflet that comes with the medicine.

What is the active substance in Posaconazole 100 mg gastro-resistant tablets?

The active substance in Posaconazole 100 mg gastro-resistant tablets is posaconazole.

Are there equivalent medicines to Posaconazole 100 mg gastro-resistant tablets?

Medicines with the same active substance, strength and form include: Noxafil 100 mg Gastro-resistant Tablets, Posaconazole 100 mg Gastro-resistant tablets, Posaconazole Amarox 100 mg gastro-resistant tablets. In total there are 6 equivalent products. They are interchangeable only if your prescriber or pharmacist says so.

Where does this information come from?

This leaflet reproduces the patient information leaflet approved for Posaconazole 100 mg gastro-resistant tablets, as published on the electronic medicines compendium (emc). The version printed inside your medicine’s packaging is the one that applies to you.

Can I get Posaconazole 100 mg gastro-resistant tablets without a prescription?

Whether a medicine is available over the counter or on prescription only depends on its licence. Check the leaflet, or ask your pharmacist — they can tell you straight away.

About this leaflet

The text above reproduces the patient information leaflet approved for this medicine, restructured for easier reading.

Medical disclaimer: This page is for information only and does not replace advice from your doctor or pharmacist. Always read the leaflet supplied with your medicine. If you are unwell, call NHS 111; in an emergency, call 999.

Medicines with the same active substance: Posaconazole (14 medicines)
See every medicine containing this substance, or browse the full A–Z of active substances.
⚕For healthcare professionals — Summary of Product Characteristics (SmPC)Full SmPC: dosage, interactions, contraindications, warnings+
Technical information intended for healthcare professionals (doctors and pharmacists). The Summary of Product Characteristics (SmPC) is the official document approved by the MHRA/EMA. It does not replace the patient leaflet or a doctor’s advice.

4.1. Therapeutic indications

Posaconazole gastro-resistant tablets are indicated for use in the treatment of the following fungal infections in adults (see sections 4.2 and 5.1):

- Invasive aspergillosis

Posaconazole gastro-resistant tablets are indicated for use in the treatment of the following fungal infections in paediatric patients from 2 years of age weighing more than 40 kg and adults (see sections 4.2 and 5.1):

- Invasive aspergillosis in patients with disease that is refractory to amphotericin B or itraconazole or in patients who are intolerant of these medicinal products;

- Fusariosis in patients with disease that is refractory to amphotericin B or in patients who are intolerant of amphotericin B;

- Chromoblastomycosis and mycetoma in patients with disease that is refractory to itraconazole or in patients who are intolerant of itraconazole;

- Coccidioidomycosis in patients with disease that is refractory to amphotericin B, itraconazole or fluconazole or in patients who are intolerant of these medicinal products.

Refractoriness is defined as progression of infection or failure to improve after a minimum of 7 days of prior therapeutic doses of effective antifungal therapy.

Posaconazole gastro-resistant tablets are also indicated for prophylaxis of invasive fungal infections in the following paediatric patients from 2 years of age weighing more than 40 kg and adults (see sections 4.2 and 5.1):

- Patients receiving remission-induction chemotherapy for acute myelogenous leukaemia (AML) or myelodysplastic syndromes (MDS) expected to result in prolonged neutropenia and who are at high-risk of developing invasive fungal infections;

- Hematopoietic stem cell transplant (HSCT) recipients who are undergoing high-dose immunosuppressive therapy for graft versus host disease and who are at high-risk of developing invasive fungal infections.

Please refer to the Summary of Product Characteristics of posaconazole oral suspension for use in oropharyngeal candidiasis.

4.2. Posology and method of administration

Treatment should be initiated by a physician experienced in the management of fungal infections or in the supportive care of high-risk patients for which posaconazole is indicated as prophylaxis.

Non-interchangeability between posaconazole tablets and posaconazole oral suspension

The tablet is not to be used interchangeably with the oral suspension due to the differences between these two formulations in frequency of dosing, administration with food and plasma drug concentration achieved. Therefore, follow the specific dose recommendations for each formulation.

Posology

Posaconazole is also available as 40 mg/mL oral suspension, 300 mg concentrate for solution for infusion, and 300 mg gastro-resistant powder and solvent for oral suspension. Posaconazole tablets generally provide higher plasma drug exposures than posaconazole oral suspension under both fed and fasted conditions. Therefore, the tablets are the preferred formulation to optimise plasma concentrations.

Recommended dose in paediatric patients from 2 years of age weighing more than 40 kg and in adults is shown in Table 1.

Posaconazole gastro-resistant powder and solvent for oral suspension is recommended for oral use in paediatric patients 2 years of age and older weighing 40 kg or less. Refer to the gastro-resistant powder and solvent for oral suspension SmPC for additional dosing information.

Table 1. Recommended dose in paediatric patients from 2 years of age weighing more than 40 kg and in adults according to indication

Indication

Dose and duration of therapy

(See section 5.2)

Treatment of invasive aspergillosis (only for adults)

Loading dose of 300 mg (three 100 mg tablets or 300 mg concentrate for solution for infusion) twice a day on the first day, then 300 mg (three 100 mg tablets or 300 mg concentrate for solution for infusion) once a day thereafter.

Each tablet dose may be taken without regard to food intake.

Recommended total duration of therapy is 6-12 weeks.

Switching between intravenous and oral administration is appropriate when clinically indicated.

Refractory invasive fungal infections (IFI)/patients with IFI intolerant to 1st line therapy

Loading dose of 300 mg (three 100 mg tablets) twice a day on the first day, then 300 mg (three 100 mg tablets) once a day thereafter.

Each dose may be taken without regard to food intake. Duration of therapy should be based on the severity of the underlying disease, recovery from immunosuppression, and clinical response.

Prophylaxis of invasive fungal infections

Loading dose of 300 mg (three 100 mg tablets) twice a day on the first day, then 300 mg (three 100 mg tablets) once a day thereafter.

Each dose may be taken without regard to food intake. Duration of therapy is based on recovery from neutropenia or immunosuppression. For patients with acute myelogenous leukaemia or myelodysplastic syndromes, prophylaxis with posaconazole should start several days before the anticipated onset of neutropenia and continue for 7 days after the neutrophil count rises above 500 cells per mm3.

Special populations

Renal impairment

An effect of renal impairment on the pharmacokinetics of posaconazole is not expected and no dose adjustment is recommended (see section 5.2).

Hepatic impairment

Limited data on the effect of hepatic impairment (including Child-Pugh C classification of chronic liver disease) on the pharmacokinetics of posaconazole demonstrate an increase in plasma exposure compared to subjects with normal hepatic function, but do not suggest that dose adjustment is necessary (see sections 4.4 and 5.2). It is recommended to exercise caution due to the potential for higher plasma exposure.

Paediatric population

The safety and efficacy of posaconazole in children aged below 2 years have not been established.

No clinical data are available.

Method of administration

For oral use

Posaconazole gastro-resistant tablets may be taken with or without food (see section 5.2). The tablets should be swallowed whole with water and should not be crushed, chewed, or broken.

4.3. Contraindications

Hypersensitivity to the active substance or to any of the excipients listed in section 6.1

Co-administration with ergot alkaloids (see section 4.5).

Co-administration with the CYP3A4 substrates terfenadine, astemizole, cisapride, pimozide, halofantrine or quinidine since this may result in increased plasma concentrations of these medicinal products, leading to QTc prolongation and rare occurrences of torsades de pointes (see sections 4.4 and 4.5).

Co-administration with the HMG-CoA reductase inhibitors simvastatin, lovastatin and atorvastatin (see section 4.5).

Co-administration during the initiation and dose-titration phase of venetoclax in Chronic Lymphocytic Leukaemia (CLL) patients (see sections 4.4 and 4.5).

4.4. Special warnings and precautions for use

Hypersensitivity

There is no information regarding cross-sensitivity between posaconazole and other azole antifungal agents. Caution should be used when prescribing posaconazole to patients with hypersensitivity to other azoles.

Hepatic toxicity

Hepatic reactions (e.g. mild to moderate elevations in ALT, AST, alkaline phosphatase, total bilirubin and/or clinical hepatitis) have been reported during treatment with posaconazole. Elevated liver function tests were generally reversible on discontinuation of therapy and in some instances these tests normalised without interruption of therapy. Rarely, more severe hepatic reactions with fatal outcomes have been reported.

Posaconazole should be used with caution in patients with hepatic impairment due to limited clinical experience and the possibility that posaconazole plasma levels may be higher in these patients (see sections 4.2 and 5.2).

Monitoring of hepatic function

Liver function tests should be evaluated at the start of and during the course of posaconazole therapy. Patients who develop abnormal liver function tests during posaconazole therapy must be routinely monitored for the development of more severe hepatic injury. Patient management should include laboratory evaluation of hepatic function (particularly liver function tests and bilirubin). Discontinuation of posaconazole should be considered if clinical signs and symptoms are consistent with development of liver disease.

QTc prolongation

Some azoles have been associated with prolongation of the QTc interval. Posaconazole must not be administered with medicinal products that are substrates for CYP3A4 and are known to prolong the QTc interval (see sections 4.3 and 4.5). Posaconazole should be administered with caution to patients with pro-arrhythmic conditions such as:

• Congenital or acquired QTc prolongation

• Cardiomyopathy, especially in the presence of cardiac failure

• Sinus bradycardia

• Existing symptomatic arrhythmias

• Concomitant use with medicinal products known to prolong the QTc interval (other than those mentioned in section 4.3).

Electrolyte disturbances, especially those involving potassium, magnesium or calcium levels, should be monitored and corrected as necessary before and during posaconazole therapy.

Drug interactions

Posaconazole is an inhibitor of CYP3A4 and should only be used under specific circumstances during treatment with other medicinal products that are metabolised by CYP3A4 (see section 4.5).

Midazolam and other benzodiazepines

Due to the risk of prolonged sedation and possible respiratory depression co-administration of posaconazole with any benzodiazepines metabolised by CYP3A4 (e.g. midazolam, triazolam, alprazolam) should only be considered if clearly necessary. Dose adjustment of benzodiazepines metabolised by CYP3A4 should be considered (see section 4.5).

Vincristine toxicity

Concomitant administration of azole antifungals, including posaconazole, with vincristine has been associated with neurotoxicity and other serious adverse reactions, including seizures, peripheral neuropathy, syndrome of inappropriate antidiuretic hormone secretion, and paralytic ileus. Reserve azole antifungals, including posaconazole, for patients receiving a vinca alkaloid, including vincristine, who have no alternative antifungal treatment options (see section 4.5).

Venetoclax toxicity

Concomitant administration of strong CYP3A inhibitors, including posaconazole, with the CYP3A4 substrate venetoclax, may increase venetoclax toxicities, including the risk of tumour lysis syndrome (TLS) and neutropenia (see sections 4.3 and 4.5). Refer to the venetoclax SmPC for detailed guidance.

Rifamycin antibacterials (rifampicin, rifabutin), flucloxacillin, certain anticonvulsants (phenytoin, carbamazepine, phenobarbital, primidone), and efavirenz.

Posaconazole concentrations may be significantly lowered in combination; therefore, concomitant use with posaconazole should be avoided unless the benefit to the patient outweighs the risk (see section 4.5).

Plasma exposure

Posaconazole plasma concentrations following administration of posaconazole tablets are generally higher than those obtained with posaconazole oral suspension. Posaconazole plasma concentrations following administration of posaconazole tablets may increase over time in some patients (see section 5.2).

Gastrointestinal dysfunction

There are limited pharmacokinetic data in patients with severe gastrointestinal dysfunction (such as severe diarrhoea). Patients who have severe diarrhoea or vomiting should be monitored closely for breakthrough fungal infections.

Photosensitivity reaction

Posaconazole may cause increased risk of photosensitivity reaction. Patients should be advised to avoid sun exposure during treatment without adequate protection such as protective clothing and sunscreen with a high sun protection factor (SPF).

Sodium

This medicinal product contains less than 1 mmol sodium (23 mg) per tablet, that is to say essentially 'sodium-free'.

4.5. Interaction with other medicinal products and other forms of interaction

Effects of other medicinal products on posaconazole

Posaconazole is metabolised via UDP glucuronidation (phase 2 enzymes) and is a substrate for p-glycoprotein (P-gp) efflux in vitro. Therefore, inhibitors (e.g. verapamil, ciclosporin, quinidine, clarithromycin, erythromycin, etc.) or inducers (e.g. rifampicin, rifabutin, certain anticonvulsants, etc.) of these clearance pathways may increase or decrease posaconazole plasma concentrations, respectively.

Rifabutin

Rifabutin (300 mg once a day) decreased the Cmax (maximum plasma concentration) and AUC (area under the plasma concentration time curve) of posaconazole to 57 % and 51 %, respectively. Concomitant use of posaconazole and rifabutin and similar inducers (e.g. rifampicin) should be avoided unless the benefit to the patient outweighs the risk. See also below regarding the effect of posaconazole on rifabutin plasma levels.

Flucloxacillin

Flucloxacillin (a CYP450 inducer) may decrease plasma posaconazole concentrations. Concomitant use of posaconazole and flucloxacillin should be avoided unless the benefit to the patient outweighs the risk (see section 4.4).

Efavirenz

Efavirenz (400 mg once a day) decreased the Cmax and AUC of posaconazole by 45 % and 50 %, respectively. Concomitant use of posaconazole and efavirenz should be avoided unless the benefit to the patient outweighs the risk.

Fosamprenavir

Combining fosamprenavir with posaconazole may lead to decreased posaconazole plasma concentrations. If concomitant administration is required, close monitoring for breakthrough fungal infections is recommended. Repeat dose administration of fosamprenavir (700 mg twice daily x 10 days) decreased the Cmax and AUC of posaconazole oral suspension (200 mg once daily on the 1st day, 200 mg twice daily on the 2nd day, then 400 mg twice daily x 8 Days) by 21 % and 23 %, respectively. The effect of posaconazole on fosamprenavir levels when fosamprenavir is given with ritonavir is unknown.

Phenytoin

Phenytoin (200 mg once a day) decreased the Cmax and AUC of posaconazole by 41 % and 50 %, respectively. Concomitant use of posaconazole and phenytoin and similar inducers (e.g. carbamazepine, phenobarbital, primidone) should be avoided unless the benefit to the patient outweighs the risk.

H2 receptor antagonists and proton pump inhibitors

No clinically relevant effects were observed when posaconazole tablets are concomitantly used with antacids, H2-receptor antagonists and proton pump inhibitors. No dose adjustment of posaconazole tablets is required when posaconazole tablets are concomitantly used with antacids, H2-receptor antagonists and proton pump inhibitors.

Effects of posaconazole on other medicinal products

Posaconazole is a potent inhibitor of CYP3A4. Co-administration of posaconazole with CYP3A4 substrates may result in large increases in exposure to CYP3A4 substrates as exemplified by the effects on tacrolimus, sirolimus, atazanavir and midazolam below. Caution is advised during co-administration of posaconazole with CYP3A4 substrates administered intravenously and the dose of the CYP3A4 substrate may need to be reduced. If posaconazole is used concomitantly with CYP3A4 substrates that are administered orally, and for which an increase in plasma concentrations may be associated with unacceptable adverse reactions, plasma concentrations of the CYP3A4 substrate and/or adverse reactions should be closely monitored and the dose adjusted as needed. Several of the interaction studies were conducted in healthy volunteers in whom a higher exposure to posaconazole occurs compared to patients administered the same dose. The effect of posaconazole on CYP3A4 substrates in patients might be somewhat lower than that observed in healthy volunteers, and is expected to be variable between patients due to the variable posaconazole exposure in patients. The effect of co-administration with posaconazole on plasma levels of CYP3A4 substrates may also be variable within a patient.

Terfenadine, astemizole, cisapride, pimozide, halofantrine and quinidine (CYP3A4 substrates)

Co-administration of posaconazole and terfenadine, astemizole, cisapride, pimozide, halofantrine or quinidine is contraindicated. Co-administration may result in increased plasma concentrations of these medicinal products, leading to QTc prolongation and rare occurrences of torsades de pointes (see section 4.3).

Ergot alkaloids

Posaconazole may increase the plasma concentration of ergot alkaloids (ergotamine and dihydroergotamine), which may lead to ergotism. Co-administration of posaconazole and ergot alkaloids is contraindicated (see section 4.3).

HMG-CoA reductase inhibitors metabolised through CYP3A4 (e.g. simvastatin, lovastatin, and atorvastatin)

Posaconazole may substantially increase plasma levels of HMG-CoA reductase inhibitors that are metabolised by CYP3A4. Treatment with these HMG-CoA reductase inhibitors should be discontinued during treatment with posaconazole as increased levels have been associated with rhabdomyolysis (see section 4.3).

Vinca alkaloids

Most of the vinca alkaloids (e.g. vincristine and vinblastine) are substrates of CYP3A4. Concomitant administration of azole antifungals, including posaconazole, with vincristine has been associated with serious adverse reactions (see section 4.4). Posaconazole may increase the plasma concentrations of vinca alkaloids which may lead to neurotoxicity and other serious adverse reactions. Therefore, reserve azole antifungals, including posaconazole, for patients receiving a vinca alkaloid, including vincristine, who have no alternative antifungal treatment options.

Rifabutin

Posaconazole increased the Cmax and AUC of rifabutin by 31 % and 72 %, respectively. Concomitant use of posaconazole and rifabutin should be avoided unless the benefit to the patient outweighs the risk (see also above regarding the effect of rifabutin on plasma levels of posaconazole). If these medicinal products are co-administered, careful monitoring of full blood counts and adverse reactions related to increased rifabutin levels (e.g. uveitis) is recommended.

Sirolimus

Repeat dose administration of posaconazole oral suspension (400 mg twice daily for 16 days) increased the Cmax and AUC of sirolimus (2 mg single dose) an average of 6.7-fold and 8.9-fold (range 3.1 to 17.5-fold), respectively, in healthy subjects. The effect of posaconazole on sirolimus in patients is unknown, but is expected to be variable due to the variable posaconazole exposure in patients. Co-administration of posaconazole with sirolimus is not recommended and should be avoided whenever possible. If it is considered that co-administration is unavoidable, then it is recommended that the dose of sirolimus should be greatly reduced at the time of initiation of posaconazole therapy and that there should be very frequent monitoring of trough concentrations of sirolimus in whole blood. Sirolimus concentrations should be measured upon initiation, during co-administration, and at discontinuation of posaconazole treatment, with sirolimus doses adjusted accordingly. It should be noted that the relationship between sirolimus trough concentration and AUC is changed during co-administration with posaconazole. As a result, sirolimus trough concentrations that fall within the usual therapeutic range may result in sub-therapeutic levels. Therefore, trough concentrations that fall in the upper part of the usual therapeutic range should be targeted and careful attention should be paid to clinical signs and symptoms, laboratory parameters and tissue biopsies.

Ciclosporin

In heart transplant patients on stable doses of ciclosporin, posaconazole oral suspension 200 mg once daily increased ciclosporin concentrations requiring dose reductions. Cases of elevated ciclosporin levels resulting in serious adverse reactions, including nephrotoxicity and one fatal case of leukoencephalopathy, were reported in clinical efficacy studies. When initiating treatment with posaconazole in patients already receiving ciclosporin, the dose of ciclosporin should be reduced (e.g. to about three quarters of the current dose). Thereafter blood levels of ciclosporin should be monitored carefully during co-administration, and upon discontinuation of posaconazole treatment, and the dose of ciclosporin should be adjusted as necessary.

Tacrolimus

Posaconazole increased Cmax and AUC of tacrolimus (0.05 mg/kg body weight single dose) by 121 % and 358 %, respectively. Clinically significant interactions resulting in hospitalisation and/or posaconazole discontinuation were reported in clinical efficacy studies. When initiating posaconazole treatment in patients already receiving tacrolimus, the dose of tacrolimus should be reduced (e.g. to about one third of the current dose). Thereafter blood levels of tacrolimus should be monitored carefully during co-administration, and upon discontinuation of posaconazole, and the dose of tacrolimus should be adjusted as necessary.

HIV Protease inhibitors

As HIV protease inhibitors are CYP3A4 substrates, it is expected that posaconazole will increase plasma levels of these antiretroviral agents. Following co-administration of posaconazole oral suspension (400 mg twice daily) with atazanavir (300 mg once daily) for 7 days in healthy subjects Cmax and AUC of atazanavir increased by an average of 2.6-fold and 3.7-fold (range 1.2 to 26-fold), respectively. Following co-administration of posaconazole oral suspension (400 mg twice daily) with atazanavir and ritonavir (300/100 mg once daily) for 7 days in healthy subjects Cmax and AUC of atazanavir increased by an average of 1.5-fold and 2.5-fold (range 0.9 to 4.1-fold), respectively. The addition of posaconazole to therapy with atazanavir or with atazanavir plus ritonavir was associated with increases in plasma bilirubin levels. Frequent monitoring for adverse reactions and toxicity related to antiretroviral agents that are substrates of CYP3A4 is recommended during co-administration with posaconazole.

Midazolam and other benzodiazepines metabolised by CYP3A4

In a study in healthy volunteers posaconazole oral suspension (200 mg once daily for 10 days) increased the exposure (AUC) of intravenous midazolam (0.05 mg/kg) by 83 %. In another study in healthy volunteers, repeat dose administration of posaconazole oral suspension (200 mg twice daily for 7 days) increased the Cmax and AUC of intravenous midazolam (0.4 mg single dose) by an average of 1.3- and 4.6-fold (range 1.7 to 6.4-fold), respectively; Posaconazole oral suspension 400 mg twice daily for 7 days increased the intravenous midazolam Cmax and AUC by 1.6 and 6.2-fold (range 1.6 to 7.6-fold), respectively. Both doses of posaconazole increased Cmax and AUC of oral midazolam (2 mg single oral dose) by 2.2 and 4.5-fold, respectively. In addition, posaconazole oral suspension (200 mg or 400 mg) prolonged the mean terminal half-life of midazolam from approximately 3-4 hours to 8-10 hours during co-administration.

Due to the risk of prolonged sedation it is recommended that dose adjustments should be considered when posaconazole is administered concomitantly with any benzodiazepine that is metabolised by CYP3A4 (e.g. midazolam, triazolam, alprazolam) (see section 4.4).

Calcium channel blockers metabolised through CYP3A4 (e.g. diltiazem, verapamil, nifedipine, nisoldipine)

Frequent monitoring for adverse reactions and toxicity related to calcium channel blockers is recommended during co-administration with posaconazole. Dose adjustment of calcium channel blockers may be required.

Digoxin

Administration of other azoles has been associated with increases in digoxin levels. Therefore, posaconazole may increase plasma concentration of digoxin and digoxin levels need to be monitored when initiating or discontinuing posaconazole treatment.

Sulfonylureas

Glucose concentrations decreased in some healthy volunteers when glipizide was co-administered with posaconazole. Monitoring of glucose concentrations is recommended in diabetic patients.

All-trans retinoic acid (ATRA) or tretinoin

As ATRA is metabolised by the hepatic CYP450 enzymes, notably CYP3A4, concomitant administration with posaconazole, which is a strong inhibitor of CYP3A4, may lead to increased exposure to tretinoin resulting in an increased toxicity (especially hypercalcaemia). Serum calcium levels should be monitored and, if needed, appropriate dose adjustments of tretinoin should be considered during the treatment with posaconazole, and during the following days after treatment.

Venetoclax

Compared with venetoclax 400 mg administered alone, co-administration of 300 mg posaconazole, a strong CYP3A inhibitor, with venetoclax 50 mg and 100 mg for 7 days in 12 patients, increased venetoclax Cmax to 1.6-fold and 1.9-fold, and AUC to 1.9-fold and 2.4-fold, respectively (see sections 4.3 and 4.4).

Refer to the venetoclax SmPC.

Paediatric population

Interaction studies have only been performed in adults.

4.6. Fertility, pregnancy and lactation

Pregnancy

There is insufficient information on the use of posaconazole in pregnant women. Studies in animals have shown reproductive toxicity (see section 5.3). The potential risk for humans is unknown.

Women of childbearing potential have to use effective contraception during treatment. Posaconazole must not be used during pregnancy unless the benefit to the mother clearly outweighs the potential risk to the foetus.

Breast-feeding

Posaconazole is excreted into the milk of lactating rats (see section 5.3). The excretion of posaconazole in human breast milk has not been investigated. Breast-feeding must be stopped on initiation of treatment with posaconazole.

Fertility

Posaconazole had no effect on fertility of male rats at doses up to 180 mg/kg (3.4 times the 300-mg tablet based on steady-state plasma concentrations in patients) or female rats at a dose up to 45 mg/kg (2.6 times the 300-mg tablet based on steady-state plasma concentrations in patients). There is no clinical experience assessing the impact of posaconazole on fertility in humans.

4.7. Effects on ability to drive and use machines

Since certain adverse reactions (e.g. dizziness, somnolence, etc.) have been reported with posaconazole use, which potentially may affect driving/operating machinery, caution needs to be used.

4.8. Undesirable effects

Summary of the safety profile

Safety data mainly derive from studies with the oral suspension.

The safety of posaconazole oral suspension has been assessed in > 2,400 patients and healthy volunteers enrolled in clinical studies and from post-marketing experience. The most frequently reported serious related adverse reactions included nausea, vomiting, diarrhoea, pyrexia, and increased bilirubin.

Posaconazole tablets

The safety of posaconazole tablet has been assessed in 104 healthy volunteers and 230 patients enrolled in a clinical study of antifungal prophylaxis.

The safety of posaconazole concentrate for solution for infusion and posaconazole tablet has been assessed in 288 patients enrolled in a clinical study of aspergillosis of whom 161 patients received the concentrate for solution for infusion and 127 patients received the tablet formulation.

The tablet formulation was investigated in AML and MDS patients and those after HSCT with or at risk for Graft versus Host Disease (GVHD) only. Maximum duration of exposure to the tablet formulation was shorter than with the oral suspension. Plasma exposure resulting from the tablet formulation was higher than observed with the oral suspension.

The safety of posaconazole tablets has been assessed in 230 patients enrolled in the pivotal clinical study. Patients were enrolled in a non-comparative pharmacokinetic and safety study of posaconazole tablets when given as antifungal prophylaxis. Patients were immunocompromised with underlying conditions including haematological malignancy, neutropenia post-chemotherapy, GVHD, and post HSCT. Posaconazole therapy was given for a median duration of 28 days. Twenty patients received 200 mg daily dose and 210 patients received 300 mg daily dose (following twice daily dosing on Day 1 in each cohort).

The safety of posaconazole tablets and concentrate for solution for infusion were also investigated in a controlled study of treatment of invasive aspergillosis. The maximum duration of invasive aspergillosis treatment was similar to that studied with the oral suspension for salvage treatment and was longer than that with the tablets or concentrate for solution for infusion in prophylaxis.

Tabulated list of adverse reactions

Within the organ system classes, adverse reactions are listed under headings of frequency using the following categories: very common (≥1/10); common (≥1/100 to <1/10); uncommon (≥1/1,000 to <1/100); rare (≥ 1/10,000 to <1/1,000); very rare (<1/10,000); not known (cannot be estimated from the available data).

Table 2. Adverse reactions by body system and frequency reported in clinical studies and/or post- marketing use*

Blood and lymphatic system disorders

Common:

Uncommon:

Rare:

neutropenia

thrombocytopenia, leukopenia, anaemia, eosinophilia, lymphadenopathy, splenic infarction

haemolytic uraemic syndrome, thrombotic thrombocytopenic purpura, pancytopenia, coagulopathy, haemorrhage

Immune system disorders

Uncommon:

Rare:

allergic reaction

hypersensitivity reaction

Endocrine disorders

Rare:

adrenal insufficiency, blood gonadotropin decreased, pseudoaldosteronism

Metabolism and nutrition disorders

Common:

Uncommon:

electrolyte imbalance, anorexia, decreased appetite, hypokalaemia, hypomagnesaemia

hyperglycaemia, hypoglycaemia

Psychiatric disorders

Uncommon:

Rare:

abnormal dreams, confusional state, sleep disorder

psychotic disorder, depression

Nervous system disorders

Common:

Uncommon:

Rare:

paraesthesia, dizziness, somnolence, headache, dysgeusia

convulsions, neuropathy, hypoaesthesia, tremor, aphasia, insomnia

cerebrovascular accident, encephalopathy, peripheral neuropathy, syncope

Eye disorders

Uncommon:

Rare:

blurred vision, photophobia, visual acuity reduced

diplopia, scotoma

Ear and labyrinth disorder

Rare:

hearing impairment

Cardiac disorders

Uncommon:

Rare:

long QT syndrome§, electrocardiogram abnormal§, palpitations, bradycardia, supraventricular extrasystoles, tachycardia

torsade de pointes, sudden death, ventricular tachycardia, cardio-respiratory arrest, cardiac failure, myocardial infarction

Vascular disorders

Common:

Uncommon:

Rare:

hypertension

hypotension, vasculitis

pulmonary embolism, deep vein thrombosis

Respiratory, thoracic and mediastinal disorders

Uncommon:

Rare:

cough, epistaxis, hiccups, nasal congestion, pleuritic pain, tachypnoea

pulmonary hypertension, interstitial pneumonia, pneumonitis

Gastrointestinal disorders

Very Common:

Common:

Uncommon:

Rare:

nausea

vomiting, abdominal pain, diarrhoea, dyspepsia, dry mouth, flatulence, constipation, anorectal discomfort

pancreatitis, abdominal distension, enteritis, epigastric discomfort, eructation, gastroesophageal reflux disease, oedema mouth

gastrointestinal haemorrhage, ileus

Hepatobiliary disorders

Common:

Uncommon:

Rare:

liver function tests raised (ALT increased, AST increased, bilirubin increased, alkaline phosphatase increased, GGT increased)

hepatocellular damage, hepatitis, jaundice, hepatomegaly, cholestasis, hepatic toxicity, hepatic function abnormal

hepatic failure, hepatitis cholestatic, hepatosplenomegaly, liver tenderness, asterixis

Skin and subcutaneous tissue disorders

Common:

Uncommon:

Rare:

Not known:

rash, pruritis

mouth ulceration, alopecia, dermatitis, erythema, petechiae

Stevens Johnson syndrome, vesicular rash

Photosensitivity reaction§

Musculoskeletal and connective tissue disorders

Uncommon:

back pain, neck pain, musculoskeletal pain, pain in extremity

Renal and urinary disorders

Uncommon:

Rare:

acute renal failure, renal failure, blood creatinine increased

renal tubular acidosis, interstitial nephritis

Reproductive system and breast disorders

Uncommon:

Rare:

menstrual disorder

breast pain

General disorders and administration site conditions

Common:

Uncommon:

Rare:

pyrexia (fever), asthenia, fatigue

oedema, pain, chills, malaise, chest discomfort, drug intolerance, feeling jittery, mucosal inflammation

tongue oedema, face oedema

Investigations

Uncommon:

altered medicine levels, blood phosphorus decreased, chest x-ray abnormal

* Based on adverse reactions observed with the oral suspension, gastro-resistant tablets, concentrate for solution for infusion, and gastro-resistant powder and solvent for oral suspension.

§ See section 4.4

Description of selected adverse reactions

Hepatobiliary disorders

During post-marketing surveillance of posaconazole oral suspension, severe hepatic injury with fatal outcome has been reported (see section 4.4).

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the Yellow Card Scheme at http://www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

4.9. Overdose

There is no experience with overdose of posaconazole tablets.

During clinical studies, patients who received posaconazole oral suspension doses up to 1,600 mg/day experienced no different adverse reactions from those reported with patients at the lower doses. Accidental overdose was noted in one patient who took posaconazole oral suspension 1,200 mg twice a day for 3 days. No adverse reactions were noted by the investigator.

Posaconazole is not removed by haemodialysis. There is no special treatment available in the case of overdose with posaconazole. Supportive care may be considered.

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