Comparing Phenergan vs Promethazine
| Phenergan | Promethazine |
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| Phenergan (promethazine) | Promethazine |
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Prescription only
Phenergan may be used to relieve allergy symptoms, nausea, or as a sleeping aid. Sedation is the main side effect. Occasionally, paradoxical reactions (the opposite of what is to be expected) may... View more |
Prescription only
Promethazine may be used to relieve allergy symptoms and nausea. Sedation is the main side effect and it may interact with several other drugs including antidepressants, antipsychotics, and other... View more |
Related suggestions Allergic Rhinitis
Nausea/Vomiting
Urticaria
Popular comparisons
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| More about Phenergan (promethazine) | More about Promethazine | ||||||||||||||||
| Ratings & Reviews | |||||||||||||||||
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Phenergan has an average rating of 7.3 out of 10 from a total of 149 ratings on Drugs.com. 68% of reviewers reported a positive effect, while 22% reported a negative effect. |
Promethazine has an average rating of 7.3 out of 10 from a total of 383 ratings on Drugs.com. 66% of reviewers reported a positive effect, while 21% reported a negative effect. |
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| Drug Class | |||||||||||||||||
| Side Effects | |||||||||||||||||
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See also: Phenergan side effects in more detail. |
See also: promethazine side effects in more detail. |
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| Generic Availability | |||||||||||||||||
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Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all Phenergan prices |
View all promethazine prices |
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| Dosage Forms Available | |||||||||||||||||
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| Brand Names | |||||||||||||||||
| Other promethazine brands include: Adgan, Anergan 50, Antinaus 50, Phenadoz, Promethegan | Adgan, Anergan 50, Antinaus 50, Phenadoz, Promethegan | ||||||||||||||||
| Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value. | |||||||||||||||||
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16 hours |
16 hours |
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| CSA Schedule ** View glossary of terms | |||||||||||||||||
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Not a controlled drug
Is not subject to the Controlled Substances Act. |
Not a controlled drug
Is not subject to the Controlled Substances Act. |
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| Pregnancy Category | |||||||||||||||||
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Category C
Risk cannot be ruled out
See the full pregnancy warnings document. |
Category C
Risk cannot be ruled out
See the full pregnancy warnings document. |
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| Drug Interactions | |||||||||||||||||
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A total of 689 drugs are known to interact with Phenergan:
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A total of 689 drugs are known to interact with promethazine:
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| Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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| Disease Interactions | |||||||||||||||||
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| First Approval Date | |||||||||||||||||
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March 29, 1951 |
March 29, 1951 |
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| WADA Class View World Anti-Doping Agency classifications. | |||||||||||||||||
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N/A |
N/A |
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| More Information | |||||||||||||||||
| Patient resources | |||||||||||||||||
| Professional Resources | |||||||||||||||||
| Related Treatment Guide | |||||||||||||||||
** The Controlled Substances Act (CSA) schedule information displayed applies to substances regulated under federal law. There may be variations in CSA schedules between individual states.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.