Phenergan is a brand product that contains Promethazine, which belongs to a class of first-generation antihistamines. It works by preventing the actions of histamines in the body. It is therefore used for the symptomatic relief of allergic rhinitis, treatment and prevention of motion sickness, nausea and vomiting. Its sedating property allows it to be used as a sleep aid for short-term insomnia.
Phenergan is available as tablets or syrups.
For allergic conditions,
Adult
Take 25mg at night, increase if necessary to 25mg twice daily.
Child 5-10 years
Take 10-25mg daily in 1-2 divided doses.
Child 2-5 years
Take 5-15mg daily in 1-2 divided doses.
For short-term insomnia,
Adult
Take 20-50mg at night.
For nausea and vomiting,
Adult
Take 25 mg at night, may increase the dose to 50-75 mg at night or to 25 mg 2-3 times daily. The maximum daily dose is 100mg.
For prevention of motion sickness,
Adult
Take 20-25mg the night before travelling and repeat in the next morning if necessary.
Child 5-10 years
Take 10mg the night before the journey and repeat in the next morning if necessary.
Child 2-5 years
Take 5mg the night before the journey and repeat in the next morning if necessary.
Common side effects of Phenergan include dizziness and drowsiness, constipation, blurred vision, and dry mouth.
Common dosing schedule:
Take with food to reduce stomach discomfort if affected.
This schedule is for reference only, adjustments may be made according to individual needs.
Some common medications Phenergan may interact with:
Please notify your doctor or pharmacist if you are taking the above medication, dosage adjustments might be needed.
In Hong Kong, Phenergan is a medicine under supervised sales and can be purchased under the supervision of a pharmacist from any pharmacies in Hong Kong. It can also be obtained from doctors. To find a pharmacy near you, refer to the list of pharmacies (“Authorized Sellers of Poisons”) from the Hong Kong Department of Health.
For more information about drug names and ingredients, you can visit Hong Kong’s Drug Office at https://www.drugoffice.gov.hk
Need more information?
For detailed information about the use of Phenergan in children, pregnancy and breastfeeding, and for questions about drug interactions, please check with your pharmacist or doctor.
Disclaimer: our goal is to provide you with the most relevant drug information and common dosage for Hong Kong. This information does not constitute medical advice. For specific treatment recommendations and advice, always discuss with your doctor or pharmacist, and follow the instructions included with your specific medicine.
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