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Drug Class: Commonly Known As: Category:
Antiobesity Agent Adult

Phentermine - Side Effects, Precautions, and Contraindications

What side effects can Phentermine cause?

Common side effects include:

  • Abdominal pain, nausea, vomiting, diarrhoea or constipation
  • Dry mouth and unpleasant taste
  • Palpitations and increased blood pressure
  • Headache, restlessness or tremor

Inform your doctor if the side effects above become severe and bothersome.

Stop the medication and inform your doctor immediately if you experience any allergic reactions (e.g. rash, swelling of the eyes or lips, difficulty breathing).

Before taking Phentermine , what precautions must I follow?

​Inform your doctor if you are taking any other medications, such as medications affecting the heart, high blood pressure medications or antidiabetic medications.

What food or medicine must I avoid when I take Phentermine ?

  • Updated on 10/4/2017 12:00:00 AM
  • Article contributed by Pharmacy Department KK Women's and Children's Hospital
The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth

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