Comparing Metformin vs Qsymia
| Metformin | Qsymia (phentermine / topiramate) |
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| Metformin | Qsymia (phentermine / topiramate) |
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Prescription only
Metformin improves how the body responds to insulin and it is used to treat type 2 diabetes. Taste disturbances, diarrhea, and other stomach-related side effects are common side effects. Metformin is... View more |
Prescription only
Prescribed for Weight Loss (Obesity/Overweight). Qsymia may also be used for purposes not listed in this medication guide. |
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| More about Metformin | More about Qsymia (phentermine / topiramate) | ||||||||||||||||
| Ratings & Reviews | |||||||||||||||||
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Metformin has an average rating of 6.8 out of 10 from a total of 655 ratings on Drugs.com. 54% of reviewers reported a positive effect, while 19% reported a negative effect. |
Qsymia has an average rating of 7.6 out of 10 from a total of 566 ratings on Drugs.com. 70% of reviewers reported a positive effect, while 15% reported a negative effect. |
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| Side Effects Experienced by Users Side effects are reported in Drugs.com user reviews and not clinically verified. | |||||||||||||||||
View all Metformin side effects |
View all Qsymia side effects |
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| Drug Class | |||||||||||||||||
| Generic Availability | |||||||||||||||||
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Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all Metformin prices |
View all Qsymia prices |
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| Dosage Forms | |||||||||||||||||
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| Brand Names | |||||||||||||||||
| Glumetza |
N/A |
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| Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | |||||||||||||||||
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4.5 hours |
65 hours |
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| CSA Schedule 1 View glossary of CSA terms | |||||||||||||||||
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Not a controlled drug
Is not subject to the Controlled Substances Act. |
Some potential for abuse
Has a low potential for abuse relative to those in schedule 3. It has a currently accepted medical use in treatment in the United States. Abuse may lead to limited physical dependence or psychological dependence relative to those in schedule 3. |
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| Pregnancy Category | |||||||||||||||||
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Category B
No proven risk in humans
See the full pregnancy warnings document. |
Category X
Not for use in pregnancy
See the full pregnancy warnings document. |
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| Drug Interactions | |||||||||||||||||
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A total of 377 drugs are known to interact with Metformin:
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A total of 417 drugs are known to interact with Qsymia:
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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 03, 1995 |
July 17, 2012 |
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| WADA Class View classifications | |||||||||||||||||
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N/A |
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| Related Treatment Guide | |||||||||||||||||
1 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.