Pharmacy Guide

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

Pharmacy Guide

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

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Acnamino MR 100mg Capsules

⚠ This medicine appears to have been discontinued

The electronic medicines compendium (emc) no longer publishes a Summary of Product Characteristics for this product, which usually means it is no longer marketed in the UK. The patient leaflet below is kept for reference, but the product may not be available.

If you were prescribed this medicine, other products containing Minocycline hydrochloride may still be available. Do not stop your treatment — ask your pharmacist or GP what to use instead.

Active substance: Minocycline hydrochloride

Equivalent medicines (same active substance, strength and form)

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

What it is and what it is used for

for Acnamino MR 100mg Capsules (referred to as Acnamino MR throughout this leaflet) contain the active ingredient minocycline. Minocycline is a tetracycline antibiotic used in the treatment of acne. It is thought that acne is partly due to, or made worse by, infection with a type of bacteria called Propionibacterium Acnes. Treating acne with Acnamino MR is intended to reduce the infection with this bacterium and so help in the overall treatment of acne

What you need to know before you take it

e Acnamino MR Do not take Acnamino MR:

  • if you are allergic to minocycline or any of the other ingredients of this medicine (listed in section 6).
  • if you are allergic to any medicines from the group of antibiotics called Tetracycline (e.g. oxytetracycline, tetracycline, doxycycline).
  • if you are pregnant, think you might be pregnant or are trying to become pregnant. Acnamino MR may cause harm to the foetus.
  • if you are breastfeeding. Medicines from the Tetracycline group (as Acnamino MR) passes through the breast milk.
  • If the person that the medicine has been prescribed for is under the age of 12.
  • if you have kidney failure. The use of Acnamino MR during tooth development (last half of pregnancy, breast-feeding infants and children under the age of 12 years) may cause dental staining and/or incomplete development of the hard tooth surface leading to pitted, small or mis-shaped sensitive teeth prone to tooth decay (enamel hypoplasia). Warnings and precautions: Talk to your doctor or pharmacist before taking Acnamino MR if:
  • You have liver problems
  • You have Systemic Lupus Erythematosus (SLE) i.e. swelling and tissue damage due to the immune system attacking the body's cells and tissues.
  • You have had, or think you might have, kidney disease
  • You have a condition called Myasthenia Gravis i.e. serious weakness in the muscles Children Do not give this medicine to children under the age of 12 years. Take special care with Acnamino MR: Acnamino MR may affect some medical tests. If you visit a hospital or clinic for any medicinal tests you should tell your doctor concerned you are taking Acnamino MR. If you are having tests on your urine for substances called Catecholamines (sometimes measured to look for problems with the adrenal gland), you should tell the doctor ordering the test that you are taking minocycline because it may interfere with the test and give the wrong result. Other medicines and Acnamino MR Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, even those not prescribed, before you start taking Acnamino MR. It is especially important that you tell your doctor or pharmacist if you are taking any of the following:
  • Medicines to thin your blood (e.g. warfarin). The dose of these medicines may need to be reduced whilst you are taking Acnamino MR
  • Diuretics (to regulate body water content), for example, thiazides, furosemide or amiloride
  • Antibiotics called beta-lactams (to treat infections). For example, penicillins (e.g. ampicillin, amoxicillin) and cephalosporins (e.g. cefalexin, cefaclor, cefadroxil)
  • Vitamins or any preparations containing iron, calcium, aluminium, magnesium, bismuth or zinc salts which can prevent Acnamino MR from working effectively when taken at the same time. It is recommended that any indigestion remedies, vitamins or other supplements containing these are taken at least 3 hours before or after your dose of Acnamino MR
  • Quinapril (ACE inhibitor) – a medicine used to treat heart disease and high blood pressure
  • Ranitidine bismuth citrate, sucralfate and tripotassium dicitratobismuthate (ulcer healing drugs)
  • Antacids such as calcium carbonate, sodium bicarbonate, aluminium or magnesium compounds
  • Kaolin (to treat diarrhoea or stomach upset)
  • Oral contraceptives (the "pill"). Taking Acnamino MR may make oral contraceptives less effective. It is very important that you do not become pregnant while taking Acnamino MR and you should take advice from your doctor on extra

precautions needed to avoid pregnancy

  • Isotretinoin (sometimes used to treat severe acne) or other retinoids or retinol should not be taken shortly before, during or shortly after a course of Acnamino MR
  • Strontium ranelate (to treat osteoporosis)
  • Ergotamine and methysergide (ergot alkaloids) – medicines used to treat migraines
  • Any medicines that can damage your liver (hepatotoxic drugs). For example: Nonsteroidal Anti-Inflammatory Drugs (NSAIDs) such as aspirin, diclofenac and ibuprofen (to treat pain, fever and inflammation); isoniazide (to treat tuberculosis), phenytoin (to treat epilepsy). It is imperative that you check with your doctor or pharmacist first to see if this applies to any medicine you are taking Acnamino MR with alcohol It is advisable not to drink too much alcohol while taking Acnamino MR. Drink alcohol only in moderation and within the Government's recommended limits. Pregnancy and breast-feeding Do not take Acnamino MR if you are pregnant or breast-feeding. If you become pregnant while taking Acnamino MR stop taking it immediately and tell your doctor (For further information see above 'Do not take Acnamino MR if'). Driving and using machines It is advisable not to drive or operate machinery if you notice headaches, lightheadedness, dizziness, tinnitus (ringing in the ears), vertigo (a feeling of unsteadiness) or effects on hearing whilst you are taking Acnamino MR. Acnamino MR contains sodium This medicine contains less than 1 mmol sodium (23 mg) per capsule, that is to say essentially 'sodium-free'.

How to take it

Acnamino MR Always take this medicine exactly as your doctor has told you. Check with your doctor or pharmacist if you are not sure. Dosage and frequency of administration

  • The usual dose for children over the age of 12 years and for adults is one capsule of Acnamino MR taken at about the same time each day.
  • For elderly patients, your doctor will advise if any dosage reduction is required. Method of administration
  • Acnamino MR capsules should be swallowed whole with a drink of water. They should not be sucked or chewed. The capsules should be taken while you are sitting upright or standing to prevent irritation of your gullet.
  • It does not matter whether you take Acnamino MR on an empty stomach or after food. However, the capsules should not be taken within 3 hours of some types of antacids, vitamins and other medicines.
  • Do not remove a capsule from the pack until you are due to take it. Never take more capsules than the doctor has told you to, it will not help you get better any faster and it could be harmful to you. Duration of treatment Acne responds quite slowly to antibiotics and it may be several weeks (e.g. six weeks or more) before you see any improvement in your acne and even longer before the full benefits are seen. For this reason it is important to finish taking all of the capsules prescribed for you by your doctor and return to see him/her when you have been asked to do so. If, however, your acne has not improved after a treatment period of six months, you should return to your doctor to have your treatment reviewed. If your doctor decides to continue your treatment with Acnamino MR for longer than 6 months, your doctor should ask to see you on a regular basis, usually once every 3 months to examine you for any possible side effects related to the liver or unusual skin colouration or a condition called Systemic Lupus Erythematosus (SLE) which can include pain or stiffness of joints, rash or fever. Your doctor will also take blood tests to measure your blood count and to assess how your liver and kidneys are working. If you take more Acnamino MR than you should If you have accidentally taken an overdose of Acnamino MR, that is more capsules than the doctor has told you to take, you should get medical help immediately, either by calling your doctor or by going to the nearest hospital accident and emergency department. Always take the labelled medicine container with you, whether there are any Acnamino MR capsules left or not. If you forget to take Acnamino MR If you do miss a dose you should take it as soon as possible. This will help to keep a constant amount of medicine in the blood. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take a double dose to make up for a forgotten dose. 4. Possible side effects Like all medicines, this medicine can cause side effects, although not everybody gets them. Serious side effects: If any of the following happen, stop taking Acnamino MR and tell your doctor immediately or go to the emergency department at your nearest hospital.
  • Severe allergic reaction that cause symptoms such as swelling of your throat, tongue, face, eyelids, mouth, lips or body, difficulty breathing or breathing very fast, difficulty

swallowing, tightness in your throat or chest, wheezing, coughing or noisy breathing, feeling faint, dizzy or fainting. You may also develop a rash that's swollen, raised or itchy. These are symptoms of a life threatening allergic reaction (anaphylaxis/ anaphylactoid reaction) (rare)

  • Allergic skin reactions such as: skin rashes made up of circular patches that are darker in the middle and lighter around the outside that may blister and peel, often with involvement of the mouth, throat eyes and genital areas (Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis) (very rare) or a red, scaling rash with skin peeling (exfoliative dermatitis) (very rare). Sometimes these types of reactions can occur with inflammation of one or more major body organs and with flu-like symptoms like a fever, sore throat and joint pain and swelling of the glands
  • Inflammation of the heart muscles or area around the heart, symptoms include – flu like symptoms, fever, chest pain or shortness of breath, irregular heartbeat, feeling lightheaded (myocarditis) (rare)
  • Inflammation of lining around your heart, symptoms include – flu like symptoms, chest pain that is felt on the left hand side of the chest or behind your breast bone that gets worst when coughing, swallowing or taking a deep breath and gets better when leaning forward (pericarditis) (rare)
  • When your laboratory results shows a high number of eosinophils (a type of white blood cell that supports your immune system), symptoms include but not limited to weight loss, fever, night sweat, swelling and confusion (eosinophilia) (rare)
  • Inflammation of the liver, muscle and joint pain, fever, flu like symptoms, tummy pain, dark urine, pale grey coloured poo, yellowing of the eye and skin and itchy skin (hepatitis) (rare)
  • Liver damage, liver failure (very rare)
  • Inflammation of the kidney which can cause swollen ankles, blood in the urine, decrease in number of times you wanting to urinate or high blood pressure (nephritis)
  • Inflammation of the lung tissues which causes breathlessness, cough and raised temperature (pneumonitis) (frequency not known)
  • Fever and lymphadenopathy (swollen or enlarged lymph nodes) may be present
  • Swelling of the blood vessels resulting in symptoms such as muscle pain, cramps, unusual tiredness or weakness, spitting blood (vasculitis) (very rare)
  • Joint pain (arthralgia) (rare)
  • Joint stiffness or joint swelling, extreme tiredness and rash over your nose and cheeks accompanied by swollen glands (systemic lupus erythematosus) (rare) or other joint problems together with fever, muscle pain
  • Any staining or discoloration (slight blue/black/grey or muddybrown) on your body or of secretions. Staining can appear on your skin, teeth or nails, inside of the mouth, eyes, in body secretions (e.g. tears, breast milk or sweat). Staining of some internal tissues such as the thyroid gland and bones can also occur. (rare) Staining may appear at any time during treatment with Acnamino MR but is more common during long-term treatment. Staining usually disappears a few months after discontinuation of the drug, although some muddy-brown skin pigmentation may persist, particularly in areas exposed to the sun Other side effects The following effects that can occur are usually mild, rare or very rare but if you experience any symptoms which are severe, persist or worry you, contact your doctor or pharmacist: Common: may affect up to 1 in 10 people
  • Dizziness (light-headedness) Uncommon: may affect up to 1 in 100 people
  • Fever Rare: may affect up to 1 in 1,000 people
  • Skin problems such as rashes most commonly due to increased sensitivity of the skin to sunlight, itching, redness, scaling or blistering. You should avoid direct exposure to sunlight or artificial light. If you experience skin discomfort then stop taking your capsules and seek advice from your doctor
  • Loss of hair (alopecia)
  • Severe skin rashes, as they may be life threatening
  • Headaches, occasionally with eyesight problems including blurred vision, "blind" spots, permanent loss of vision or double vision
  • Build up of pressure around the brain (intracranial hypertension)
  • Cough
  • Shortness of breath (dyspnoea)
  • Hearing problems such as loss of hearing, ringing in the ears (tinnitus) or unsteadiness (vertigo)
  • Stomach upsets, diarrhoea, sickness, loss of appetite or sore mouth. If you take a contraceptive pill and get diarrhoea or sickness or bleed when you don't expect to, your "pill" may not work. You should use a different or additional means of birth control (e.g. a condom or diaphragm/cap) to ensure you are protected. Read the leaflet that came with your "pill". See also Section 2 of this leaflet
  • Vomiting
  • Nausea
  • Increased liver enzymes (liver problems)
  • Increased serum urea (kidney problems)
  • Acute kidney failure (rapid loss of your kidneys ability to remove waste), Interstitial nephritis (kidney condition characterized by swelling in between the kidney tubules)
  • Abnormally low levels of white blood cells, resulting in an increase in infections (neutropenia, leucopenia)
  • Reduction of blood platelets, which increase risk of bleeding or bruising (thrombocytopenia)
  • Swollen, stiff or painful joints or muscle pain. Tender, bruise like swelling of the shins
  • Pain in the abdomen, pale stools or difficulty passing urine
  • Sudden unexplained fever or sore throat, extreme tiredness, unexplained bruising or bleeding • Numbness, tingling feelings (like pins and needles) in

the hands and feet

  • Eating disorder causing loss of weight (anorexia) Very rare: may affect up to 1 in 10,000 people
  • Abnormal thyroid function (show up only in blood test results)
  • Worsening of asthma
  • Reduction in red blood cells which can make the skin pale and yellowish and can cause weakness or breathlessness (anaemia)
  • Swelling of the pancreas which can lead to pain in the centre of your abdomen, spreading to the back, nausea, vomiting and fever (pancreatitis)
  • Red patches on the skin, white patches in the mouth or itching around the anus or vagina which may be accompanied by vaginal discharge. Vaginal inflammation which may be accompanied by pain on urinating
  • Build up of fluid in the brain or swelling of the brain due to increased pressure (bulging fontanelle)
  • Infiltration of eosinophils, a type of white blood cells, into the lungs causing breathing difficulties, chest tightness, pain, fever, cough and wheezing (pulmonary eosinophilia)
  • Heartburn or difficulty in swallowing, lower abdominal pain or blood and mucous in stools, sometimes due to swelling of the gullet or ulcers in the gullet (oesophageal ulceration)
  • Incomplete development of the hard tooth surface leading to pitted, small or mis-shaped sensitive teeth prone to tooth decay
  • Inflammation of the digestive tract due to a bacterial infection (enterocolitis)
  • Inflammation of the oesophagus (oesophagitis)
  • Inflammation of the tongue (glossitis)
  • A severe form of colitis which affects the lining of the colon causing abdominal discomfort and diarrhea (pseudomembranous colitis)
  • Oral cavity discoloration (including tongue, lip and gum)
  • Loss of appetite, feeling sick, itchy skin, vomiting blood, build up of fluid in the legs and abdomen (liver failure or cirrhosis)
  • Yellowing of the skin or whites of the eyes (jaundice)
  • A worsening or development of symptoms of SLE (systemic lupus erythematosus) or a worsening of the symptoms of myasthenia gravis (weakness of muscles)
  • Inflammation of blood vessels, often with skin rash
  • Swelling and redness of the tongue, inside of the mouth, or around the eyes (angioedema)
  • Inflammation of blood vessels of all sizes affecting both veins and arteries, symptoms include fever, fatigue, joint pain, purple skin discolorations, weight loss and numbness/tingling of arms and legs (vasculitis)
  • Redness or swelling of the area round the tip of the penis (balanitis)
  • Discolouration of secretions such as sweat or tears Not known: frequency cannot be estimated from the available data
  • Uncontrollable shaking of the muscles (Convulsions)
  • Sedation (Sleepiness)
  • Inflammation of the liver that occurs when your body's immune system turns against your liver (autoimmune hepatitis)
  • A form of relapsing vasculitis affecting medium size blood vessels, symptoms include weight loss, muscle and joint pain, skin rashes and ulcers and numbness/tingling of arms and legs (polyarteritis nodosa)
  • Severe reduction in the number of white blood cells which makes infections more likely (agranulocytosis) Reporting of side effects If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting

Possible side effects

you can help provide more information on the safety of this medicine.

How to store it

Acnamino MR Store the capsules in the original package. 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 outer carton and on each blister strip after EXP. The expiry date refers to the last day of that month. 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 Acnamino MR contains The active substance is minocycline. Each capsule contains 100 mg of the active substance minocycline as minocycline hydrochloride. The other ingredients are: microcrystalline cellulose, povidone, croscarmelose sodium, magnesium stearate, iron oxide red (E-172), silica colloidal anhydrous, iron oxide yellow (E-172), hypromellose phthalate, triethyl citrate, opadry OY-S-24932 pink (which contains hypromellose 2910, macrogol 6000, titanium dioxide (E-171), talc, iron oxide red (E-172)), carnauba wax, hard Gelatin Capsule (which contains gelatin, titanium dioxide (E-171), yellow iron oxide (E-172), black iron oxide (E-172), red iron oxide (E-172)). What Acnamino MR looks like and content of the pack Acnamino MR is a hard gelatin capsule, with an opaque-buff body and an opaque-brown cap, containing one pink filmcoated tablet, and one peach enteric-coated tablet. These MR capsules are intended to provide "modified r elease" of the active substance minocycline so that some is released in the stomach and some in the small intestine. Acnamino MR is available in packs of 56 capsules, in foil blister strips. Marketing Authorization Holder and Manufacturer Dexcel®-Pharma Ltd., 2nd Floor, Bourn, 1 Manor House Drive, Coventry, CV1 2FX, UK This leaflet was last revised in January 2026.

Frequently asked questions about Acnamino MR 100mg Capsules

How do I take Acnamino MR 100mg Capsules?

Acnamino MR 100mg Capsules comes as capsule 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 Acnamino MR 100mg Capsules?

The active substance in Acnamino MR 100mg Capsules is minocycline hydrochloride.

Are there equivalent medicines to Acnamino MR 100mg Capsules?

Medicines with the same active substance, strength and form include: Minocin MR 100 mg Modified Release Capsules. 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 Acnamino MR 100mg Capsules, 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 Acnamino MR 100mg Capsules 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: Minocycline hydrochloride (2 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

Acnamino MR 100 mg capsules are indicated for the treatment of acne.

Consideration should be given to official guidance on the appropriate use of antibacterial agents.

4.2. Posology and method of administration

Posology

Adults

One 100 mg capsule every 24 hours

Paediatric Population

Children over 12 years:

One 100 mg capsule every 24 hours

Children under 12 years:

Minocycline should not be used in children under 12 years of age

Elderly:

Dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

Renal insufficiency:

Minocycline must not be given to persons in renal failure. In lesser degrees of renal insufficiency, reduction of dosage and monitoring of renal function may be required (see sections 4.3 and 4.4).

Hepatic insufficiency:

Minocycline should be used with caution in patients with hepatic dysfunction (see section 4.4).

Treatment of acne should be continued for a minimum of 6 weeks, and where possible limited to a maximum of six months. If, after six months, there is no satisfactory response, Acnamino MR should be discontinued and other therapies considered.

If Acnamino MR is to be continued for longer than six months, patients should be monitored (including laboratory investigations) at least three monthly thereafter for signs and symptoms of hepatitis or systemic lupus erythematosus (SLE) or unusual pigmentation (see section 4.4 Special Warnings and Precautions).

Method of Administration

To reduce the risk of oesophageal irritation and ulceration, the capsules should be swallowed whole with plenty of fluid, while sitting or standing. Unlike other tetraacyclines, absorption of minocycline is not significantly impaired by food or moderate amounts of milk.

4.3. Contraindications

Use of minocycline is contraindicated in the following:

• Hypersensitivity to the active substance minocycline, other tetracyclines or to any of the excipients listed in section 6.1.

• Pregnancy and lactation.

• Children under the age of 12 years.

• Complete renal failure.

4.4. Special warnings and precautions for use

Rare, anaphylaxis/anaphylactoid reactions including shock and fatalities have been associated with the administration of minocycline (see section 4.8 Undesirable effects).

Acnamino MR should be used with caution in patients with hepatic dysfunction and in conjunction with alcohol and other hepatotoxic drugs. It is recommended that alcohol consumption should remain within the Government's recommended limits.

Rare cases of auto-immune hepatotoxicity and isolated cases of systemic lupus erythematosus (SLE) and also exacerbation of pre-existing SLE have been reported. If patients develop signs or symptoms of SLE or hepatotoxicity, or suffer exacerbation of pre-existing SLE, minocycline should be discontinued.

Other rare, serious events have occurred with minocycline including Stevens-Johnson Syndrome and toxic epidermal necrolysis (see section 4.8 Undesirable effects). Acnamino MR should be discontinued if either of these serious skin reactions is suspected.

Minocycline is contraindicated in persons with renal failure. Clinical studies have shown that there is no significant drug accumulation in patients with renal impairment when they are treated with minocycline in the recommended doses. In cases of severe renal insufficiency, reduction of dosage and monitoring of renal function may be required. The anti-anabolic action of the tetracyclines may cause an increase in serum urea. In patients with significantly impaired renal function, higher serum levels of tetracyclines may lead to uraemia, hyperphosphataemia and acidosis. If renal impairment exists, even usual oral and parenteral doses may lead to excessive systemic accumulations of the drug and possible liver toxicity.

Caution is advised in patients with myasthenia gravis as tetracyclines can cause weak neuromuscular blockade.

Cross-hypersensitivity between tetracyclines may occur in patients (see section 4.3).

Cross-resistance between tetracyclines may develop in micro-organisms and cross-sensitisation in patients. Acnamino MR should be discontinued if there are signs/symptoms of overgrowth of resistant organisms, e.g. enteritis, glossitis, stomatitis, vaginitis, pruritus and or Staphylococcal enteritis.

Patients taking oral contraceptives should be warned that if diarrhoea or breakthrough bleeding occur there is a possibility of contraceptive failure.

Minocycline may cause hyperpigmentation at various body sites (see Administration and section 4.8 Undesirable Effects). Hyperpigmentation may present regardless of dose or duration of therapy but develops more commonly during long term treatment. Patients should be advised to report any unusual pigmentation without delay and Acnamino MR should be discontinued.

If a photosensitivity reaction occurs, patients should be warned to avoid direct exposure to natural or artificial light and to discontinue therapy at the first signs of skin discomfort.

As with other tetracyclines, bulging fontanelles in infants and benign intracranial hypertension in juveniles and adults have been reported. Presenting features were headache and visual disturbances including blurring of vision, scotoma and diplopia. Permanent vision loss has been reported.

Treatment should cease if evidence of raised intracranial pressure develops.

Elderly:

Dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

Paediatric population:

Acnamino MR is contraindicated in children of less than 12 years of age. The use of tetracyclines during tooth development in children under the age of 12 years may cause permanent discolouration. Enamel hypoplasia has also been reported.

Laboratory monitoring:

Periodic laboratory evaluations of organ system function, including haematopoietic, renal and hepatic should be conducted.

Excipient information:

Sodium

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

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

Tetracyclines depress plasma prothrombin activity and reduced doses of concomitant anticoagulants may be necessary.

Diuretics may aggravate nephrotoxicity by volume depletion.

Minocycline should not be used with beta-lactam antibacterial agents due to the possibility of antagonism.

Bacteriostatic drugs may interfere with the bactericidal action of penicillin. Avoid giving tetracycline-class drugs in conjunction with penicillin. Absorption of minocycline is impaired by the concomitant administration of antacids, iron, calcium, magnesium, aluminium, bismuth and zinc salts (interactions with specific salts, antacids, bismuth containing ulcer – healing drugs, quinapril which contains a magnesium carbonate excipient). It is recommended that any indigestion remedies, vitamins, or other supplements containing these salts are taken at least 3 hours before or after a dose of Acnamino MR. Unlike earlier tetracyclines, absorption of minocycline is not significantly impaired by food or moderate amounts of milk.

The concomitant use of tetracyclines may reduce the efficacy of oral contraceptives.

Administration of isotretinoin should be avoided shortly before, during and shortly after Acnamino MR therapy. Each drug alone has been associated with pseudotumor cerebri (benign intracranial hypertension) (see section 4.4 Special Warngings and Precautions).

Interference with laboratory and other diagnostic tests:

False elevations of urinary catecholamine levels may occur due to interference with the fluorescence test.

4.6. Fertility, pregnancy and lactation

Pregnancy

Minocycline is contraindicated during pregnancy as it can cause fetal harm (see section 4.3).

Results of animal studies indicate that tetracyclines cross the placenta, are found in foetal tissues and can have toxic effects on the developing foetus (often related to retardation of skeletal development). Evidence of embryotoxicity has also been noted in animals treated early in pregnancy. Acnamino MR therefore, should not be used in pregnancy unless considered essential.

In humans, minocycline like other tetracycline-class antibiotics, crosses the placenta and may cause foetal harm when administered to a pregnant woman. In addition, there have been post marketing reports of congenital abnormalities including limb reduction. If Acnamino MR is used during pregnancy or if the patient becomes pregnant while taking this drug, the patient should be informed of the potential hazard to the foetus.

The use of drugs of the tetracycline class during tooth development (last half of pregnancy) may cause permanent discolouration of the teeth (yellow-grey-brown). This adverse reaction is more common during long term use of the drugs but has been observed following repeated short term courses. Enamel hypoplasia has also been reported.

Tetracyclines administered during the last trimester form a stable calcium complex throughout the human skeleton. A decrease in fibula growth rate has been observed in premature human infants given oral tetracyclines in doses up to 25mg/kg every 6 hours. Changes in fibula growth rate were shown to be reversible when the drug was discontinued.

Breast-feeding

Minocycline is contraindicated during breast-feeding (see section 4.3).

Tetracyclines have been found in the milk of lactating women who are taking a drug in this class. Permanent tooth discolouration may occur in the developing infant and enamel hypoplasia has been reported.

4.7. Effects on ability to drive and use machines

Headache, light-headedness, dizziness, tinnitus and vertigo (more common in women) and, rarely, impaired hearing have occurred with minocycline. Patients should be warned about the possible hazards of driving or operating machinery during treatment. These symptoms may disappear during therapy and usually disappear when the drug is discontinued.

4.8. Undesirable effects

The assessment of side effects is based on the following frequency information:

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).

System Organ Class

Frequency

Adverse Reaction

Infections and Infestations

Very Rare

Oral and anogenital candidiasis, vulvovaginitis

Blood and Lymphatic System Disorders

Rare

Eosinophilia, leucopoenia, neutropenia, thrombocytopenia

Very Rare

Haemolytic anaemia, pancytopenia

Not known

Agranulocytosis

Immune System Disorders

Rare

Anaphylaxis/anaphylactoid reaction (including shock and fatalities)

Not known

Hypersensitivity, pulmonary infiltrates, anaphylactoid purpura, Polyarteritis nodosa

Endocrine Disorders

Very Rare

Abnormal thyroid function, brown-black discolouration of the thyroid

Metabolism and Nutrition Disorders

Rare

Anorexia

Nervous System Disorders

Common

Dizziness (light-headedness)

Rare

Headache, hypaesthesia, paraesthesia, intracranial hypertension, vertigo

Very Rare

Bulging fontanelle

Not Known

Convulsions, sedation

Ear and Labyrinth Disorders

Rare

Impaired hearing, tinnitus

Cardiac Disorders

Rare

Myocarditis, pericarditis

Respiratory, Thoracic and Mediastinal Disorders

Rare

Cough, dyspnoea

Very Rare

Bronchospasm, exacerbation of asthma, pulmonary eosinophilia

Not Known

Pneumonitis

Gastrointestinal Disorders

Rare

Diarrhoea, nausea, stomatitis, discolouration of teeth (including adult tooth discolouration), vomiting

Very Rare

Dyspepsia, dysphagia, enamel hypoplasis, enterocolitis, oesophagitis, oesophageal ulceration, glossitis, pancreatitis, pseudomembranous colitis

Not Known

Oral cavity discolouration (including tongue, lip and gum)

Hepatobiliary Disorders

Rare

Increased liver enzymes, hepatitis, autoimmune toxicity

Very Rare

Hepatic cholestatis, hepatic failure (including fatalities), hyperbilirubinaemia, jaundice

Not Known

Autoimmune hepatitis

Skin and Subcutaneous Tissue Disorders

Rare

Alopecia, erythema multiforme, erythema nodosum, fixed drug eruption, hyperpigmentation of skin, photosensitivity, pruritus, rash, urticaria

Very Rare

Angioedema, exfoliative dermatitis, hyperpigmentation of nails, Stevens-Johnson Syndrome, toxic epidermal necrolysis, vasculitis

Musculoskeletal, Connective Tissue Disorders

Rare

Arthralgia, lupus-like syndrome, myalgia

Very Rare

Arthritis, bone discolouration, cases of or exacerbation of systemic lupus erythematosus (SLE), joint stiffness, joint swelling

Renal and Urinary Disorders

Rare

Increase serum urea, acute renal failure, interstitial nephritis

Reproductive System and Breast Disorders

Very Rare

Balanitis

General Disorders and Administration Site Conditions

Uncommon

Fever

Very Rare

Discolouration of secretions

The following syndromes have been reported. In some cases involving these syndromes, death has been reported. As with other serious adverse reactions, if any of these syndromes are recognised, the drug should be discontinued immediately:

• Hypersensitivity syndrome consisting of cutaneous reaction (such as rash or exfoliative dermatitis), eosinophilia, and one or more of the following: hepatitis, pneumonitis, nephritis, myocarditis, pericarditis.

• Fever and lymphadenopathy may be present.

• Lupus-like syndrome consisting of positive antinuclear antibody, arthralgia, arthritis, joint stiffness or joint swelling, and one or more of the following: fever, myalgia, hepatitis, rash, vasculitis.

• Serum sickness-like syndrome consisting fever, urticaria or rash, and arthralgia, arthritis, joint stiffness or joint swelling. Eosinophilia may be present.

• Hyperpigmentation of various body sites including the skin, nails, teeth, oral mucosa, bones, thyroid, eyes (including sclera and conjunctiva), breast milk, lacrimal secretions and perspiration has been reported.

This blue/black/grey or muddy-brown discolouration may be localised or diffuse. The most frequently reported site is in the skin. Pigmentation is often reversible on discontinuation of the drug, although it may take several months or may persist in some cases. The generalised muddy-brown skin pigmentation may persist, particularly in areas exposed to the sun.

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: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store.

4.9. Overdose

Dizziness, nausea and vomiting are the adverse effects most commonly seen with overdose. There is no specific antidote. In cases of overdose, discontinue medication, treat symptomatically with gastric lavage and appropriate supportive measures. Minocycline is not removed in significant quantities by haemodialysis or peritoneal dialysis.

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