Comparing Fentanyl vs Phenergan
Fentanyl | Phenergan |
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Fentanyl | Phenergan (promethazine) |
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Prescription only
Fentanyl is a very potent pain-relieving medicine. It is not recommended for people who have never been prescribed opioid-type pain relief before, and deaths have been reported from improper dosing... View more |
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 |
Related suggestions |
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More about Fentanyl | More about Phenergan (promethazine) | ||||||||||||||||
Ratings & Reviews | |||||||||||||||||
Fentanyl has an average rating of 7.9 out of 10 from a total of 429 ratings on Drugs.com. 72% of reviewers reported a positive effect, while 11% reported a negative effect. |
Phenergan has an average rating of 7.3 out of 10 from a total of 148 ratings on Drugs.com. 68% of reviewers reported a positive effect, while 22% reported a negative effect. |
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Drug Class | |||||||||||||||||
Side Effects | |||||||||||||||||
See also: fentanyl side effects in more detail. |
See also: Phenergan side effects in more detail. |
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Generic Availability | |||||||||||||||||
Lower cost generic |
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Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all fentanyl prices |
View all Phenergan prices |
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Dosage Forms Available | |||||||||||||||||
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Brand Names | |||||||||||||||||
Actiq, Duragesic, Fentanyl Transdermal System, Fentora, Lazanda, Subsys | Other promethazine brands include: 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. | |||||||||||||||||
8.7 hours |
16 hours |
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CSA Schedule ** View glossary of terms | |||||||||||||||||
High potential for abuse
Has a high potential for abuse. Has a currently accepted medical use in treatment in the United States or a currently accepted medical use with severe restrictions. Abuse may lead to severe psychological or physical dependence. |
Not a controlled drug
Is not subject to the Controlled Substances Act. |
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Pregnancy Category | |||||||||||||||||
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 | |||||||||||||||||
A total of 611 drugs are known to interact with fentanyl:
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A total of 689 drugs are known to interact with Phenergan:
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Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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Disease Interactions | |||||||||||||||||
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First Approval Date | |||||||||||||||||
February 19, 1968 |
March 29, 1951 |
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WADA Class View World Anti-Doping Agency classifications. | |||||||||||||||||
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.