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Promethazine (Phenergan): uses, side effects & brands
Promethazine is a sedating antihistamine for nausea, allergy and travel sickness. It belongs to the Vertigo & anti-nausea (vestibular) medicine group. These relieve dizziness (vertigo), motion sickness and nausea by acting on the balance and vomiting centres.
Drug type — dosing is set by your doctor
| Measure | Range |
|---|---|
| Drug class | Vertigo & anti-nausea (vestibular) medicine |
| Type | Prescription |
| Dose | Individual — ask your doctor or pharmacist |
What it is used for
- Nausea and vomiting
- Motion (travel) sickness
- Allergies such as hay fever, hives and itching
- Short-term help with sleep
Common brand names
- India: Phenergan, Avomine
- Worldwide: Phenergan
Common side effects
- Drowsiness, including next-day sleepiness
- Dry mouth
- Blurred vision
- Skin more sensitive to sunlight
Before taking it — precautions
- Never give to children under two years — it can dangerously slow breathing
- Alcohol, sleeping tablets and opioid painkillers greatly increase drowsiness
- Tell your doctor about breathing problems, epilepsy, glaucoma or prostate trouble
When to see a doctor urgently
- Slow or shallow breathing, or very hard to wake (urgent)
- Muscle spasms or unusual movements
- Rash, swelling of the face or difficulty breathing (urgent)
Not a prescription — no dose shown. The right dose of promethazine depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.
Frequently asked questions
Can I use it as a sleeping tablet?
Only short term — it is not meant for long-term sleep problems.
Can I drive the next day?
Drowsiness can last into the next day, so check how you feel first.
Is it safe for children?
Never under two years; older children only as the label or doctor advises.
Explore more
Sources & further reading
- World Health Organization (WHO)
- MedlinePlus — U.S. National Library of Medicine
- Ministry of Health & Family Welfare, India
- Indian Council of Medical Research (ICMR)
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.