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Promethazine: Uses, Dosage, Side Effects, and More
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Promethazine is a prescription antihistamine used to treat allergy symptoms, nausea and vomiting, motion sickness, and sleep problems. It works by blocking histamine and dopamine receptors in the body, which helps reduce allergic reactions, calm nausea, and produce mild sedation. Phenergan may also be used before or after surgery to prevent motion sickness or to enhance the effects of pain or sleep medications.
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Controlled Substance Warning
Promethazine is not a controlled substance, but requires a prescription and should be used with caution. It can cause significant drowsiness and should not be combined with alcohol, sedatives, or other central nervous system depressants without a doctor’s approval.
Drug Facts
Generic Name
Promethazine Hydrochloride
Brand Names
Phenergan, Phenadoz, Promethegan
Drug Type
Antihistamine / Antiemetic / Sedative
Dosage Forms
Tablets, suppositories, syrup, injection
Typical Dosage
12.5–25 mg every 4–6 hours as needed for nausea or allergies; 25 mg at bedtime for sleep or motion sickness prevention (dosage varies by condition and patient response)
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Disclaimer
The information provided on this page is for general informational purposes only and is not intended as medical advice. Always consult with a licensed healthcare provider before starting, stopping, or changing any medication regimen. While Invictus strives to provide accurate and up-to-date information, individual health conditions and circumstances vary. The prices, availability, and descriptions of all medications on this page are subject to change.
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