Phentermine

Medically Reviewed by Dr. Harshi Dhingra, M.D.

Last Reviewed: Sep 06, 2022

Common Questions


Common Questions about Phentermine


How fast does phentermine make you lose weight?

Phentermine can lead to weight loss over a period of 3-6 months. Keep in mind that this medication works in conjunction with exercise and a calorie restricted diet.



How much weight can you lose in a month on phentermine?

Results vary from person to person. In general, phentermine can help you lose 3-7% of your body weight. You can expect to lose anywhere from 3 lbs to 5 lbs a month on phentermine. Remember that phentermine is for short-term use only (a few weeks).



What does phentermine do to the body?

Phentermine works on the brain and reduces appetite. However, it can only result in weight loss when combined with an exercise program and a calorie-reduced diet.



Is phentermine the same as fen phen?

No, fen phen contains phentermine and another drug called fenfluramine. Fen phen has been banned as it was found to cause heart problems.



How long can I take phentermine?

Phentermine is meant to be taken for the short term (a few weeks) to help speed up weight loss. Your doctor will advise you on how long to take this medicine.



What is the price of phentermine without insurance?

Without insurance, phentermine can be as high as $44.99, but with a free BuzzRx prescription discount coupon, you could pay as low as $11.58 for the most common version of this medication. Use the BuzzRx drug price look-up tool to find the lowest discounted price, and be sure to enter the correct dosage, form, and quantity for the most accurate pricing. While generics tend to have the best savings, you can also use your BuzzRx card and coupons to purchase brand-name versions. It never hurts to ask your pharmacist to try BuzzRx when filling or refilling any of your prescription drugs—whether you have insurance or not.



What is the price of phentermine with insurance?

Ask your pharmacist or insurance provider for your copay price on phentermine—copay amounts vary depending on the type of insurance plan you have and if there is a deductible to reach before prescription drug coverage begins.

You could save up to 80% on your prescription medication with a free BuzzRx discount coupon for phentermine. When using the BuzzRx lookup tool to find the price of your medicine, be sure to enter the correct dosage, form, and quantity to receive the most accurate discounted pricing. It never hurts to ask your pharmacist to try BuzzRx when filling or refilling any of your prescriptions—whether you have insurance or not.