Phentermine

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

Last Reviewed: Sep 06, 2022

Pros & Cons


Phentermine Pros and Cons

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  • Phentermine is an FDA-approved weight loss drug that can reduce appetite and help with weight loss.
  • The extended-release (long-acting) formulation of phentermine only needs to be taken once a day.
  • You can take this medicine with or without food.
  • Phentermine is available in a low-cost generic form.

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  • Phentermine only works in conjunction with exercise and a reduced-calorie diet.
  • This medicine can be habit forming.
  • You cannot take phentermine if you have heart disease, increased blood pressure, overactive thyroid gland, glaucoma, or a history of drug abuse.
  • Insurance may not cover phentermine, and you may have to pay for this medicine out of pocket.