About promethazine

About promethazine Promethazine is an antihistamine medicine that relieves the symptoms of allergies.

It’s known as a drowsy (sedating) antihistamine, so it’s more likely to make you feel sleepy than other antihistamines.

Promethazine is used for:

About promethazine
  • short-term sleep problems (insomnia) – including when a cough, cold or itching is keeping you awake at night
  • allergies, including hay fever and hives (urticaria)
  • feeling and being sick (vomiting) – due to motion sickness or vertigo
  • cold symptoms, such as coughing and a runny nose

You can buy promethazine from pharmacies, where it’s often sold as Avomine, Phenergan or Sominex. Promethazine is also available on prescription.

It comes as tablets, capsules and a liquid that you swallow.

You can also buy promethazine mixed with other medicines, such as paracetamol, dextromethorphan, pholcodine or pudoephedrine, to treat coughs and colds or pain.

2. Key facts

  • Do not drink alcohol while taking promethazine. Alcohol increases the risks of side effects.
  • To help you sleep, take promethazine 20 minutes before you go to bed. It normally takes about 30 minutes to work.
  • To prevent motion sickness, take promethazine the night before a long journey or 1 to 2 hours before a short journey.
  • Common side effects of promethazine include drowsiness, headaches, nightmares and feeling dizzy, restless or confused.
  • When promethazine is mixed with other medicines, it’s also known by the brand names Day & Night Nurse, Fedril and Night Nurse.

3. Who can and cannot take promethazine

Promethazine can be taken by most adults.

Children under 6 should not be given cough and cold medicines containing promethazine if they have been bought at a pharmacy. These medicines should only be given if prescribed by a doctor.

Some types of promethazine medicines are not suitable for children over 6. Some are labelled 12+ and some are labelled 16+. Your doctor or pharmacist will advise which are the safest for children.

Promethazine is not suitable for some adults. To make sure it’s safe for you, tell your doctor or pharmacist if you:

  • have ever had an allergic reaction to promethazine or any other medicine
  • have an eye problem called primary angle closure glaucoma
  • have problems peeing or emptying your bladder
  • have epilepsy or any other health problem that causes seizures or fits
  • are due to have an allergy test. Promethazine can affect your results, so you may need to stop taking it a few days before your

Leave a Reply

Your email address will not be published.