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Phentermine

Where is Phentermine used?

Phentermine is an oral weight loss medication. The U.S. Food and Drug Administration (FDA) has approved this prescription as a complementary medication for people who find it difficult to lose weight after having diet changes. Phentermine is usually prescribed in people with risk factors such as:

  • High blood pressure
  • High cholesterol
  • Diabetes

How does Phentermine work?

Phentermine is a type of drug called a stimulant or sympathomimetic drug. This activates the fight or flight nervous system to reduce the appetite. As an appetite suppressant, it stimulates the release of neurotransmitters in the brain. These neurotransmitters are elevated in levels to make you feel full and thus eat less. As a result, it will help in weight loss along with exercise and a proper diet.

How is Phentermine taken?

If taking this medication for the first time, you must try to be on the lowest dosage that is effective for you due to potential side effects. The dose must allow you to successfully lose weight. Follow carefully the instructions given by your healthcare provider or doctor.

This is usually recommended for up to 12 weeks at a time to help weight loss.

  • The dosages 30 mg and 37.5 mg may be taken 1 to 2 hours before breakfast. Each dose is usually taken once a day in the morning.
  • The 8 mg dose may be taken 30 minutes before a meal. Each dose can be taken up to 3 times each day.

A control in higher dose may be required for better appetite. Do not change the given dose or take it more/less than it is prescribed. Doing so may not be effective on your weight loss and might develop certain complications. Take the medicine with a full glass of water. Swallow the medicine as a whole.

What are the precautions in taking Phentermine?

  • Breastfeeding is not recommended while taking a dose of Phentermine.
  • This prescription is not recommended for use in children 16 years of age and younger.
  • Older adults should not take this medicine. This is not as safe as other medicines that can be used to treat the same condition.
  • Taking this medicine along with other diet medications may cause pulmonary hypertension. Do not take a dose of Phentermine with any other diet medications without the consent of your doctor.
  • Let your doctor know about all your current medications and any prescriptions you start or stop using. This includes over-the-counter and prescription medicines, herbal products, and vitamins. 
  • Call your doctor right away if you think this medication is not functioning properly, or within 4 weeks you have not lost at least 4 pounds.
  • Taking a dose of this prescription should not be done by anyone who has a history of drug misuse.
  • Do not take this medicine if you are not obese or overweight.
  • Do not stop taking a dose of Phentermine suddenly, or you can have withdrawal symptoms. You may ask your doctor how to stop safely using this medication.
  • Drinking alcohol with this medication can worsen certain side effects.