Promethazine is used to treat and prevent allergic conditions such as hayfever and skin rashes. It is also used for nausea and vomiting, or to help you sleep.
Take promethazine as directed.
Take the tablets with a glass of water.
Measure the liquid carefully with an oral syringe or measuring spoon.
If you take promethazine regularly and it is nearly time for your next dose, skip the missed dose and take your next dose at the usual time. Otherwise, take the missed dose as soon as you remember. Do not take two doses at the same time.
Some medicines available without a prescription may react with promethazine including:
Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products (e.g. valerian) or recreational drugs.
|Side Effects||Recommended action|
Fast or irregular heartbeat, fainting
|Tell your doctor immediately|
Unusual behaviour or thinking, loss of co-ordination, confusion
|Tell your doctor|
Dry mouth, blurred vision, constipation or trouble peeing (anticholinergic effects)
Drowsiness, dizziness, headache
More sensitive to sunlight (sunburn or rash)
|Tell your doctor if troublesome|
If you notice any other effects, discuss them with your doctor or pharmacist.
This leaflet contains important, but not all, information about this medicine.
Prepared by the PILs Committee at Christchurch Hospital, Canterbury District Health Board, New Zealand. August 2021
For more general information about this sheet annd its contents, see: What does a My Medicines sheet cover?
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My Medicines Patient Information Leaflets (PILs) contain important, but not all, information about the medicines they describe.
For more information about the sheets, see: What does a My Medicines sheet cover?
My Medicines is developed by a team at the Canterbury District Health Board. Our team is made up of doctors, pharmacists, and a non-medical person to help us keep to plain language. We also discuss our information with specialist health professionals or groups when needed