Phenergan 25mg Tablets
Pack of 56 tablets · Film-coated tablets
A pharmacy-only sedating antihistamine sometimes used short-term to relieve symptoms of stress-related restlessness or sleep disturbance.
Official medicine information
View the SmPC and Patient Information Leaflet on emc
electronic Medicines Compendium — the authoritative source for UK licensed medicine information.
Active ingredient
Promethazine hydrochloride
Strength
25mg
Form
Film-coated tablets
Pack size
Pack of 56 tablets
How it works
Promethazine is a sedating antihistamine that has a calming effect, useful for short-term relief of stress-related symptoms in adults.
How to take
Adults: usually one tablet up to three times a day, or one to two tablets at night, as advised by the pharmacist. Short-term use only.
Possible side effects
- Drowsiness
- Dry mouth
- Blurred vision
- Headache
Important warnings
- Do not drive or operate machinery if drowsy.
- Avoid alcohol.
- Not suitable in epilepsy, glaucoma, prostate enlargement or severe liver disease.
- Speak to the pharmacist if pregnant, breastfeeding or on other medicines.
Storage
Store below 25°C in the original packaging. Keep out of the sight and reach of children.
Important
This information is provided for general guidance only and is not a substitute for professional clinical advice. Treatment is only supplied following a consultation, suitability checks and pharmacist review. If this medicine is not suitable for you, our pharmacist will discuss alternatives.
Always read the patient information leaflet supplied with your medicine. If you have a medical emergency, call 999 immediately.
Suspected side effects can be reported via the MHRA Yellow Card scheme. Reporting helps make medicines safer for everyone.
Last reviewed by our Superintendent Pharmacist: Jane Doe MRPharmS, April 2026.
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