Patient leaflets and SmPCs, drug interaction checker, official dosages and NHS pharmacy opening hours — all in one place.
Patient leaflets and SmPCs, drug interaction checker, official dosages and NHS pharmacy opening hours — all in one place.
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 Phenylephrine hydrochloride may still be available. Do not stop your treatment — ask your pharmacist or GP what to use instead.
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6) Connect the syringe to the IV access. Push the plunger slowly to inject the required volume. 7) Any unused medicinal product or waste material should be disposed of in accordance with local requirements.
This medicine belongs to a group of adrenergic and dopaminergic agents. It is used to treat low blood pressure during anaesthesia.
Phenylephrine Injection You will not receive Phenylephrine Injection:
The administration will be performed by a healthcare professional with appropriate training and relevant experience, who will decide the correct dosage for you and when and how the injection should be administered. The recommended doses are: Use in Adults Your doctor will determine the dose to be administered, and may repeat or adjust it until the desired effect is attained. Use in patients with impaired renal function (kidneys not functioning well) Lower doses of phenylephrine may be needed in patients with impaired renal function. Use in patients with impaired liver function (liver not functioning well) Higher doses of phenylephrine may be needed in patients with cirrhosis of the liver. Use in older people Treatment in older people should be carried out with care. Use in children This medicine is not recommended for use in children due to insufficient data on efficacy, safety and dosage recommendations. If you have been given more Phenylephrine Injection than you should: You may have the following symptoms: palpitations, cardiac rhythm disorders (tachycardia, cardiac arrhythmias). If you have any further questions on the use of this medicine, ask your doctor, pharmacist, or nurse.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Some side effects may be serious (frequencies are not known). Tell your doctor straight away if you get any of the following:
Phenylephrine Injection Keep this medicine out of the sight and reach of children. You should not be given this medicine after the expiry date which is stated on the carton and syringe label. The expiry date refers to the last day of that month. Your doctor or nurse will check this. This medicine does not require any special temperature storage conditions. Keep the blister in the outer carton in order to protect from light. Keep the syringe in its unopened blister until use. Do not use this medicine if you notice visible signs of deterioration. Any syringe, even partially used, should be discarded appropriately after use. 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.
What Phenylephrine Injection contains The active ingredient is phenylephrine hydrochloride.
TECHNICAL LEAFLET
Phenylephrine 50 micrograms/ml, Solution for injection in pre-filled syringe The following information is intended for medical and healthcare professionals only: This is an extract from the Summary of Product Characteristics to assist in the administration of PHENYLEPHRINE 50 micrograms/ml, solution for injection in pre-filled syringe. When determining appropriateness of use in a particular patient, the prescriber should be familiar with the Summary of Product Characteristics of the product. Qualitative and quantitative composition: Each ml of solution for injection contains phenylephrine hydrochloride equivalent to 50 micrograms (0.05 mg) phenylephrine. Each 10 ml pre-filled syringe contains phenylephrine hydrochloride equivalent to 500 micrograms (0.5 mg) phenylephrine. Excipients with known effect: sodium. Each ml of solution for injection contains 3.72 mg equivalent to 0.162 mmol of sodium. Each 10 ml pre-filled syringe contains 37.2 mg equivalent to 1.62 mmol of sodium. Other excipients: Sodium citrate, Citric acid monohydrate, Sodium hydroxide, water for injections. Description of solution: Clear colorless solution. pH: 4.7 – 5.3 Osmolality: 270-300 mOsm/Kg Posology and method of administration Posology Adults Normal dose is 50 to 100 micrograms, which can be repeated until the desired effect is obtained. One bolus dose should not exceed 100 micrograms. Renal impairment Lower doses of phenylephrine may be needed in patients with impaired renal function. Hepatic Impairment Higher doses of phenylephrine may be needed in patients with cirrhosis of the liver. Elderly Treatment of the elderly should be carried out with care. Paediatric population The safety and efficacy of phenylephrine in children have not been established. No data are available. Method of administration: Intravenous bolus injection. Phenylephrine, 50 micrograms/ml, solution for injection should only be administered by healthcare professionals with appropriate training and relevant experience. The pre-filled syringe is not suitable for use in a syringe driver. Contraindications Phenylephrine should not be used:
Phenylephrine 50 micrograms/ml, Solution for Injection in Pre-filled Syringe comes as injection containing 50micrograms/ml. Always follow the dose your doctor or pharmacist has given you, and read the leaflet that comes with the medicine.
The active substance in Phenylephrine 50 micrograms/ml, Solution for Injection in Pre-filled Syringe is phenylephrine hydrochloride.
This leaflet reproduces the patient information leaflet approved for Phenylephrine 50 micrograms/ml, Solution for Injection in Pre-filled Syringe, as published on the electronic medicines compendium (emc). The version printed inside your medicine’s packaging is the one that applies to you.
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.
The text above reproduces the patient information leaflet approved for this medicine, restructured for easier reading.
Treatment of hypotension during spinal, epidural or general anaesthesia.
Posology
Adults
Normal dose is 50 to 100 micrograms, which can be repeated until the desired effect is obtained. One bolus dose should not exceed 100 micrograms.
Renal impairment
Lower doses of phenylephrine may be needed in patients with impaired renal function.
Hepatic Impairment
Higher doses of phenylephrine may be needed in patients with cirrhosis of the liver.
Elderly:
Treatment of the elderly should be carried out with care.
Paediatric population
The safety and efficacy of phenylephrine in children have not been established. No data are available.
Method of administration:
Intravenous bolus injection.
Phenylephrine, 50 micrograms/ml, solution for injection should only be administered by healthcare professionals with appropriate training and relevant experience.
The pre-filled syringe is not suitable for use in a syringe driver.
Phenylephrine should not be used:
- In case of hypersensitivity to the active substance or to any of the excipients listed in section 6.1;
- in patients with severe hypertension or peripheral vascular disease due to the risk of ischemic gangrene or vascular thrombosis;
- in combination with non-selective monoamine oxidase inhibitors (MAOs) (or within 2 weeks of their withdrawal) due to risk of paroxysmal hypertension and possibly fatal hyperthermia (see section 4.5);
- in patients with severe hyperthyroidism.
The arterial blood pressure should be monitored during treatment.
Phenylephrine should be administered with care to patients with:
- diabetes mellitus;
- arterial hypertension;
- uncontrolled hyperthyroidism;
- coronary heart disease and chronic heart conditions;
- non-severe peripheral vascular insufficiency,
- bradycardia;
- partial heart block;
- tachycardia;
- arrhythmias;
- angina pectoris (phenylephrine can precipitate or exacerbate angina in patients with coronary artery disease and history of angina);
- aneurysm;
- closed angle glaucoma.
Phenylephrine can induce a reduction in cardiac output. Therefore, care should be exercised in administering to patients with arteriosclerosis, the elderly and to patients with impaired cerebral or coronary circulation.
In patients with reduced cardiac output or coronary vascular disease, vital organ functions should be closely monitored and dose reduction should be considered when systemic blood pressure is near the lower end of the target range.
In patients with serious heart failure or cardiogenic shock, phenylephrine may cause deterioration in the heart failure as a consequence of the induced vasoconstriction (increase in afterload).
Particular attention should be paid when administering Phenylephrine injection to avoid extravasation, since this may cause tissue necrosis.
This medicinal product contains 37.2 mg sodium per pre-filled syringe, equivalent to 1.9 % of the WHO recommended maximum daily intake of 2 g sodium for an adult.
Contraindicated combinations (see section 4.3)
• Non-selective monoamine oxidase inhibitors (MAOs) (iproniazid, nialamide)
Paroxysmal hypertension, hyperthermia possibly fatal. Due to the long duration of action of MAOIs, this interaction is still possible 15 days after discontinuation of the MAOI.
Inadvisable combinations
• Dopaminergic ergot alkaloids (bromocriptine, cabergoline, lisuride, pergolide):
Risk of vasoconstriction and/or hypertensive crisis.
• Vasoconstrictor ergot alkaloids (dihydroergotamine, ergotamine, methylergometrine, methylsergide):
Risk of vasoconstriction and/or hypertensive crisis.
• Tricyclic antidepressants (e.g. imipramine):
Paroxysmal hypertension with possibility of arrhythmias (inhibition of adrenaline or noradrenaline entry in sympathetic fibres).
• Noradrenergic-serotoninergic antidepressants (minalcipram, venlafaxine):
Paroxysmal hypertension with possibility of arrhythmias (inhibition of adrenaline or noradrenaline entry in sympathetic fibres).
• Selective type A monoamine oxidase inhibitors (MAOs) (moclobemide, toloxatone)
Risk of vasoconstriction and/or hypertensive crisis.
• Linezolid:
Risk of vasoconstriction and/or hypertensive crisis.
• Guanethidine and related products:
Substantial increase in blood pressure (hyperreactivity linked to the reduction in sympathetic tone and /or to the inhibition of adrenaline or noradrenaline entry in sympathetic fibres). If the combination cannot be avoided, use with caution lower doses of sympathomimetic agents.
• Cardiac glycosides, quinidine:
Increased risk of arrhythmias.
• Sibutramine:
Paroxysmal hypertension with possibility of arrhythmias (inhibition of adrenaline or noradrenaline entry in sympathetic fibres).
• Halogenated volatile anaesthetics (desflurane, enflurane, halothane, isoflurane, methoxyflurane, sevoflurane):
Risk of perioperative hypertensive crisis and arrhythmia.
Combinations requiring precautions for use:
• Oxytocic agents:
The effect of presso-active sympathomimetic amines is potentiated. Thus, some oxytocic agents may cause severe persistent hypertension and strokes can occur during post-partum period.
Pregnancy
Animal studies are insufficient with respect to reproductive toxicity and teratogenicity (see section 5.3).
Administration of phenylephrine in late pregnancy or labour may potentially cause foetal hypoxia and bradycardia. Use of injectable phenylephrine is possible during pregnancy in accordance with the indications.
The combination with some oxytocic agents can cause severe hypertension (see section 4.5).
Breast-feeding
Small quantities of phenylephrine are excreted in human breast milk and oral bioavailability may be low.
Administering vasoconstrictors to the mother exposes the infant to a theoretical risk of cardiovascular and neurological effects. However, in the event of a single bolus administration during childbirth, breast-feeding is possible.
Fertility
There is no available data concerning fertility after exposure to phenylephrine (see section 5.3).
Not relevant.
Summary of the safety profile
The most common adverse events of phenylephrine are bradycardia, hypertensive episodes, nausea and vomiting. Hypertension is more frequent with high doses.
The most commonly reported cardiovascular adverse event appears to be bradycardia, likely due to baroreceptor-mediated vagal stimulation and consistent with the pharmacological effect of phenylephrine.
List of adverse reactions
Frequency: Not known (cannot be estimated from available data)
Immune system disorders:
Not known: hypersensitivity
Psychiatric disorders:
Not known: Anxiety, excitability, agitation, psychotic states, confusion.
Nervous system disorders
Not known: Headache, nervousness, insomnia, paresthesia, tremor.
Eye disorders:
Not known: Mydriasis, aggravation of pre-existing angle-closure glaucoma
Cardiac disorders:
Not known: Reflex bradycardia, tachycardia, palpitations, hypertension, arrhythmia, angina pectoris, myocardial ischemia.
Vascular disorders:
Not known: Cerebral haemorrhage, hypertensive crisis
Respiratory, thoracic and mediastinal disorders:
Not known: Dyspnoea, pulmonary oedema
Gastrointestinal disorders:
Not known: Nausea, vomiting
Skin and subcutaneous tissue disorders:
Not known: Sweating, pallor or skin blanching, piloerection, skin necrosis with extravasation
Musculoskeletal and connective tissue disorders:
Not known: muscular weakness
Renal and urinary disorders:
Not known: Difficulty in micturition and urinary retention
Description of selected adverse reactions
As phenylephrine has been frequently used in the critical care setting in patients with hypotension and shock, some of the reported serious adverse events and deaths are probably related to the underlying disease and not related to the use of phenylephrine.
Other special population(s)
Elderly: risk for phenylephrine toxicity is increased in elderly patients (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 Yellow Card Scheme
Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store
Symptoms of overdose include headache, nausea, vomiting, paranoid psychosis, hallucinations, hypertension and reflex bradycardia. Cardiac arrhythmia such as ventricular extrasystoles and short paroxysmal episodes of ventricular tachycardia may occur.
Treatment should consist of symptomatic and supportive measures. The hypertensive effects may be treated with an alpha-adrenoceptor blocking drug, such as phentolamine.
Medicines sold in Romania with the same active substance: Cunoscut în România ca
Same active substance. The strength, the form and whether you need a prescription can differ. Always ask a pharmacist before you switch. Romanian medicines in the UK →
Medicines sold in Poland with the same active substance: W Polsce znany jako
Same active substance. The strength, the form and whether you need a prescription can differ. Always ask a pharmacist before you switch. Polish medicines in the UK →
Ask anything about Phenylephrine 50 micrograms/ml, Solution for Injection in Pre-filled Syringe. The assistant answers only from this leaflet — if the leaflet does not cover it, it will say so. It does not give medical advice.
Answers come from the patient leaflet published on the electronic medicines compendium (emc). They are not medical advice. Ask a pharmacist or your GP if you are unsure. For urgent help call NHS 111, or 999 in an emergency.
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