Comparing Phentermine vs Vyvanse
Phentermine | Vyvanse (lisdexamfetamine) |
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Phentermine | Vyvanse (lisdexamfetamine) |
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Prescription only
Phentermine may be used short-term as an aid to weight loss; however, it can be addictive and tolerance may develop to its weight-losing effects, rendering it less effective with time. Prescribed for... View more |
Prescription only
Vyvanse is a stimulant used for the treatment of ADHD to reduce symptoms such as impulsiveness and hyperactivity and to increase attention. It can also help increase the number of binge-free days per... View more |
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More about Phentermine | More about Vyvanse (lisdexamfetamine) | ||||||||||||||||
Ratings & Reviews | |||||||||||||||||
Phentermine has an average rating of 8.6 out of 10 from a total of 3016 ratings on Drugs.com. 82% of reviewers reported a positive effect, while 5% reported a negative effect. |
Vyvanse has an average rating of 7.4 out of 10 from a total of 979 ratings on Drugs.com. 65% 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 Phentermine side effects |
View all Vyvanse side effects |
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Drug Class | |||||||||||||||||
Generic Availability | |||||||||||||||||
Lower cost generic |
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Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all Phentermine prices |
View all Vyvanse prices |
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Dosage Forms | |||||||||||||||||
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Brand Names | |||||||||||||||||
Adipex-P, Atti-Plex P, Lomaira | Other lisdexamfetamine brands include: Arynta | ||||||||||||||||
Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | |||||||||||||||||
20 hours |
1 hour |
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CSA Schedule 1 View glossary of CSA terms | |||||||||||||||||
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. |
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. |
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Pregnancy Category | |||||||||||||||||
Category X
Not for use in pregnancy
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 196 drugs are known to interact with Phentermine:
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A total of 396 drugs are known to interact with Vyvanse:
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Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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Disease Interactions | |||||||||||||||||
First Approval Date | |||||||||||||||||
August 14, 1973 |
February 23, 2007 |
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WADA Class View classifications | |||||||||||||||||
More Information | |||||||||||||||||
Patient Resources | |||||||||||||||||
Professional Resources | |||||||||||||||||
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.