Comparing Contrave vs Phentermine
Contravebupropion / naltrexone |
Phentermine |
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Prescribed for Weight Loss, Obesity. Contrave may also be used for purposes not listed in this medication guide. |
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... more |
Choose a suggestion below |
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Prescription only |
Prescription only |
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Ratings & ReviewsRecent helpful reviews |
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6.7
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8.7
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Drug Class |
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Side Effects |
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Common side effects include: constipation, dizziness, headache, insomnia, nausea, and vomiting. See the full Contrave side effects document. |
See the full phentermine side effects document. |
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Pricing and Coupons* Prices are without insurance |
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Generic Availability |
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No |
Yes (this medicine) |
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Dosage Form(s) Available |
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Brand Names |
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N/A |
Adipex-P, Atti-Plex P, Lomaira, Pro-Fast HS, Pro-Fast SA, Pro-Fast SR | ||||||||||||||||
Half LifeThe 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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21 hours |
20 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. |
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 X
Not for use in pregnancy
See the full Pregnancy Warnings document. |
Category X
Not for use in pregnancy
See the full Pregnancy Warnings document. |
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FDA Alerts |
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N/A |
N/A |
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Drug Interactions |
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A total of 1099 drugs are known to interact with Contrave:
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A total of 521 drugs are known to interact with phentermine:
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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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September 10, 2014 |
August 14, 1973 |
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WADA ClassView World Anti-Doping Agency classifications. |
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More Information |
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Consumer Resources |
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Professional Resources |
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Related Treatment Guide |
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** 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.
For Obesity I am 56yo woman, 405 lbs (not a typo), 5'9" tall. I find in thus forum that most people don't have the amount of wright to lose as I do yet I am hopeful. I started Contrave June 8th 2017 and have lost 11lbs. Soon I'll be up to 3 tabs/day. I find that it is helping somewhat yet I still am craving fast food. I am following a low carb diet with no exercise yet. I hope that the higher dose will help with the cravings more. Side effects for me have been lethargy and some nausea. I plan on continuing this med in hope that I finally can resolve my food addiction.