Comparing Phentermine vs Topamax
Phentermine Remove Phentermine from your drug comparison | Topamax Remove Topamax from your drug comparison |
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Phentermine Remove Phentermine from your drug comparison | Topamax topiramate Remove Topamax from your drug comparison | ||||||||||||||||
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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 |
Topamax may be prescribed either alone or in combination with other medications for the treatment of certain types of epilepsy, or it may be given for the prevention of migraine. Drowsiness is a... View more |
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Prescription only |
Prescription only |
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Ratings & ReviewsRecent helpful reviews |
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8.7
For Weight Loss: SW 283, GW167, CW223! Lost 60 lbs in a little more than 4months. Take phentermine about 5 days per week. Use MyFitnessPal. Walk and hike a lot. Weight train a little. Try to eat as much protein as I can and be carb conscious. So glad I don’t have significant negative side effects. They were worse during the first week, but now am just thirsty and have mild to moderate constipation. I’d say it’s worth it. And if you can, push through the first week of sweaty palms etc. unless of course it causes significant medical concerns. Also, have adopted a bit of a zig zag pattern to calorie consumption with one very low calorie day per week. This is working for me. Glad to be more than half way to my goal! |
6.3
For Migraine Prevention: I took Topamax as much as 300mg/day for 15 years and my last dose was 150mg at night. I recently changed to Lyrica which is also an anti-convulsant and am taking 100mg/day and find it more effective than Topamax without the memory and lost word problems. I discontinued Topamax because it slowly got to the point where I could not remember something for an hour. Topamax also was causing erectile dysfunction problems for the last 3 years. I do not have this problem with Lyrica. In the end I was getting 5 or more migraines a week and now get 2 or 3 a week and expect to increase Lyrica to 300mg/day. For Migraine Prevention: I had migraines that lasted up to nine days. My neurologist started me on 25mg Topamax and the frequency dropped off immediately. I actually loved the way I felt on Topamax. I had boundless energy, no appetite, and was always in a good mood. After two years, I decided to stop taking it because my skin was breaking out and I think I felt a little too confident in myself. I drove a little faster, said really odd things to people (no filter) and seemed to be turning into a show off about how skinny I was. Not my best personality! I stopped taking it and didn't gain any weight, but the headaches are back. Once my dermatologist gets my skin cleared up, I might go back on it, but will be very mindful of the side effects. |
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Drug Class |
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Side Effects |
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See the full phentermine side effects document. |
Common side effects include: anxiety, ataxia, confusion, diarrhea, diplopia, dizziness, drowsiness, dysphasia, fatigue, lack of concentration, memory impairment, nausea, nervousness, paresthesia, psychomotor disturbance, speech disturbance, depression, visual disturbance, weight loss, dysgeusia, mood changes, and anorexia. See the full Topamax side effects document. |
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Pricing and Coupons* Prices are without insurance |
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View all phentermine prices |
View all Topamax prices and generic prices |
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Generic Availability |
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Yes (this medicine) |
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Dosage Form(s) Available |
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Brand Names |
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Adipex-P, Atti-Plex P, Lomaira | Other topiramate brands include: Qudexy XR, Trokendi XR | ||||||||||||||||
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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20 hours |
56 hours |
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CSA Schedule**View glossary of 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. |
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Pregnancy Category |
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Category X
Not for use in pregnancy
See the full Pregnancy Warnings document. |
Category D
Positive evidence of risk
See the full Pregnancy Warnings document. |
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FDA Alerts |
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N/A |
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Drug Interactions |
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A total of 168 drugs are known to interact with phentermine:
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A total of 264 drugs are known to interact with Topamax:
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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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August 14, 1973 |
December 24, 1996 |
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WADA ClassView World Anti-Doping Agency classifications. |
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N/A |
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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 Weight Loss: I tried to be more active in small ways and started intermittent fasting. I was able to lose 8lbs before being prescribed phentermine. This put my starting weight when I began phentermine 232lbs. I started on 01/11/2020 and as of today 02/04/2020, I weigh 214lbs. That’s 18lbs down. This time around has been completely different. I swear by intermittent fasting, I drink green tea and water only (approximately 96oz), I mainly eat fruit, veggies, trail mixes and seafood. When I feel hungry between meals, I eat an apple or a serving of trail mix. I also workout 45-50 minutes 5 days a week in addition to walking my dog 1/4 of a mile on my lunch breaks. I can truly say that my weight-loss is not just because of the phentermine. I put in a lot of work! That’s the true key to success. Phentermine is not a magic pill but it’s certainly an aid to help keep you on track. I’m working hard to create healthy, lifelong habits. Good luck everyone!