Comparing Naltrexone vs Phentermine
| Naltrexone | Phentermine |
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| Naltrexone | Phentermine |
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Prescription only
Naltrexone is used as an adjunct to social and psychotherapy in the treatment of opioid and alcohol addiction. People taking naltrexone need to have completely stopped taking all types of opioids... View more |
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 |
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| More about Naltrexone | More about Phentermine | ||||||||||||||||
| Ratings & Reviews | |||||||||||||||||
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Naltrexone has an average rating of 7.9 out of 10 from a total of 602 ratings on Drugs.com. 73% of reviewers reported a positive effect, while 16% reported a negative effect. |
Phentermine has an average rating of 8.6 out of 10 from a total of 3014 ratings on Drugs.com. 82% of reviewers reported a positive effect, while 5% 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 Naltrexone side effects |
View all Phentermine side effects |
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| Drug Class | |||||||||||||||||
| Generic Availability | |||||||||||||||||
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Lower cost generic |
Lower cost generic |
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| Pricing and Coupons * Prices are without insurance | |||||||||||||||||
View all Naltrexone prices |
View all Phentermine prices |
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| Dosage Forms | |||||||||||||||||
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| Brand Names | |||||||||||||||||
| Vivitrol | Adipex-P, Atti-Plex P, Lomaira | ||||||||||||||||
| Half Life Drug half-life is the time required for plasma concentration to reduce to half its original value. | |||||||||||||||||
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10 hours |
20 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 C
Risk cannot be ruled out
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 352 drugs are known to interact with Naltrexone:
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A total of 196 drugs are known to interact with Phentermine:
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| Alcohol/Food/Lifestyle Interactions | |||||||||||||||||
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| Disease Interactions | |||||||||||||||||
| First Approval Date | |||||||||||||||||
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November 20, 1984 |
August 14, 1973 |
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| WADA Class View classifications | |||||||||||||||||
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N/A |
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| 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:
Suboxone
Suboxone (buprenorphine and naloxone) is used to treat opiate addiction. Includes Suboxone side ...
Subutex
Subutex (buprenorphine) is used to treat opioid addiction. Includes Subutex side effects ...
Aqneursa
Aqneursa information from Drugs.com, includes Aqneursa side effects, interactions and indications.
Belbuca
Belbuca (buprenorphine) is used for chronic pain management. Includes Belbuca side effects ...
Vivitrol
Vivitrol is a long-acting injectable form of naltrexone used to treat alcohol use disorder and ...
Sublocade
Sublocade information from Drugs.com, includes Sublocade side effects, interactions and indications.
Butrans
Butrans (buprenorphine) transdermal patches are used to treat moderate to severe chronic pain ...
Campral
Campral is used to help people with alcohol dependence quit drinking alcohol. Learn about side ...
Brixadi
Brixadi (buprenorphine) is a weekly or monthly injection used to treat moderate to severe opioid ...
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.