Fastin Alternatives Compared
| Fastin (phentermine) | Semaglutide | Mounjaro (tirzepatide) |
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| Fastin (phentermine) | Semaglutide | Mounjaro (tirzepatide) |
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Prescription only
Prescribed for Weight Loss (Obesity/Overweight). Fastin may also be used for purposes not listed in this medication guide. |
Prescription only
Semaglutide (Ozempic, Rybelsus) lowers blood sugar levels by mimicking the effects of GLP-1, a naturally occurring hormone that stimulates insulin secretion and lowers glucagon secretion from the... View more |
Prescription only
Prescribed for Weight Loss (Obesity/Overweight), Type 2 Diabetes. Mounjaro may also be used for purposes not listed in this medication guide. |
Related suggestions Weight Loss (Obesity/Overweight)
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| More about Fastin (phentermine) | More about Semaglutide | More about Mounjaro (tirzepatide) | ||||||||
| Ratings & Reviews | ||||||||||
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Fastin has an average rating of 7.2 out of 10 from a total of 81 ratings on Drugs.com. 70% of reviewers reported a positive effect, while 22% reported a negative effect. |
Semaglutide has an average rating of 6.9 out of 10 from a total of 2750 ratings on Drugs.com. 56% of reviewers reported a positive effect, while 20% reported a negative effect. |
Mounjaro has an average rating of 8.5 out of 10 from a total of 1434 ratings on Drugs.com. 79% of reviewers reported a positive effect, while 6% 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 Fastin side effects |
View all Semaglutide side effects |
View all Mounjaro side effects |
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| Drug Class | ||||||||||
| Generic Availability | ||||||||||
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N/A |
N/A |
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| Pricing and Coupons * Prices are without insurance | ||||||||||
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We could not find an exact match for this medicine. Try searching the Price Guide directly. |
We could not find an exact match for this medicine. Try searching the Price Guide directly. |
View all Mounjaro prices |
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| Dosage Forms | ||||||||||
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N/A |
N/A |
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| Brand Names | ||||||||||
| Other phentermine brands include: Adipex-P, Atti-Plex P, Lomaira | Ozempic, Rybelsus, Wegovy | Other tirzepatide brands include: Zepbound | ||||||||
| Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | ||||||||||
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20 hours |
168 hours |
120 hours |
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| CSA Schedule 1 View glossary of CSA terms | ||||||||||
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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. |
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 X
Not for use in pregnancy
See the full pregnancy warnings document. |
Summary unavailable. See the full pregnancy warnings document. |
Summary unavailable. See the full pregnancy warnings document. |
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| Drug Interactions | ||||||||||
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A total of 196 drugs are known to interact with Fastin:
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A total of 275 drugs are known to interact with Semaglutide:
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A total of 416 drugs are known to interact with Mounjaro:
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| Alcohol/Food/Lifestyle Interactions | ||||||||||
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| Disease Interactions | ||||||||||
| First Approval Date | ||||||||||
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August 14, 1973 |
December 05, 2017 |
N/A |
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| WADA Class View classifications | ||||||||||
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N/A |
N/A |
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| More Information | ||||||||||
| Patient Resources | ||||||||||
| Professional Resources | ||||||||||
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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.
See also:
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.