CDHB

Phentermine

fen-ter-meen

What does it do?

Phentermine is used to help you lose weight.

Before you start

  • Tell your doctor if you have heart or kidney problems, high blood pressure, angle-closure glaucoma, or if you have ever had a stroke.
  • Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding.

How should you take it?

Take phentermine as part of a weight loss plan from a health professional.
Take phentermine regularly as directed with a glass of water. Swallow the capsules whole.
It is best to take phentermine in the morning as it can cause trouble sleeping.

What if you forget a dose?

If it is after lunchtime, skip the missed dose and take your next dose at the usual time. Otherwise, take the missed dose as soon as you remember. Do not take two doses at the same time.

Can you take other medicines?

Tell your pharmacist or doctor about all medicines or treatments that you may be taking, including vitamins, herbal products or recreational drugs.

Important information continues on next page.

What side effects might you notice?

Side EffectsRecommended action

Chest pain

Tell your doctor immediately

Fast or irregular heartbeat

Swollen feet or legs, short of breath

Unusual behaviour or thinking

Tell your doctor

Trouble sleeping, restlessness, nervousness

Headache

Dry mouth, unpleasant taste

Stomach upset

Trouble getting or keeping an erection

Tell your doctor if troublesome

If you notice any other effects, discuss them with your doctor or pharmacist.