Who should not take phentermine?

Phentermine is only available for purchase with a doctor’s prescription. A medical professional is the best person to decide if this medication is right for you.

Phentermine should NOT be taken if are:

  • Younger than 18 years old
  • Pregnant, nursing or trying to become pregnant
  • Taking any medications that interact negatively with phentermine, including MAOIs or other weight loss pills

It is also NOT appropriate if you have:

  • A BMI < 27 (if you are underweight, at a healthy weight or just slightly overweight)
  • An allergy to phentermine HCl, or any other drug in the sympathetic amine family
  • High blood pressure (hypertension)
  • Cardiovascular disease
  • Overactive thyroid (hyperthyroidism)
  • Glaucoma
  • A history of alcohol or other drug abuse
  • A history of suffering from an agitated state
Phentermine may not be right for you if you have:
  • Diabetes
  • Kidney disease

When you speak with your doctor about a possible phentermine prescription, it is important to tell him or her about all current and recent medications and supplements, and their dosages. Phentermine can interact with many substances, so it is important that your doctor know about everything you’re taking.

To read more about phentermine precautions, please click here.