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Facts About...


Brand names


Reason for taking this medicine

Ethambutol is used to treat tuberculosis (TB). It is used with other TB medicines.

How to take this medicine

  • It is very important that you take ethambutol exactly as prescribed
  • If you think you might be pregnant, or you are breastfeeding, tell your doctor/health care provider before starting ethambutol
  • If you miss a dose, take it as soon as possible but never take two doses at one time
  • Take ethambutol with food. This may prevent stomach upset
  • Do not store ethambutol in areas where there is direct sunlight, heat or moisture


  • Tell your doctor and pharmacist if you have any drug allergies before starting ethambutol
  • Tell your doctor/health care provider if you have ever had kidney disease, gout, or eye disease, such as cataracts
  • Always tell your doctor/health care provider and pharmacist if you are taking other medicines or vitamins

While most people can take ethambutol with no problem, rarely it may cause some side effects. Tell your doctor/health care provider if you have

  • Loss of appetite
  • Nausea, vomiting
  • Stomach pain
  • Metallic taste
  • Swelling of face
  • Fever, chills
  • Headache, dizziness, confusion
  • Joint pain, gout episode
  • Skin rash, itchiness, hives or trouble breathing

In some people, ethambutol may affect how well you see. Stop taking ethambutol and see your doctor/health care provider if you have the following symptoms:

  • Blurred or changed vision
  • Inability to see the colours: red or green
  • Eye pain
  • "Spots" in your vision

August 2016

For more information call
905-668-7711 OR 1-800-841-2729