• Basic Info
• Top Questions
• Interactions

Do not take antacids that contain aluminum within several hours of taking a dose of ethambutol. Aluminum will decrease the amount of ethambutol that is absorbed by the body. If you need an antacid, ask your doctor or pharmacist to recommend one that is aluminum free.

Drugs other than those listed here may also interact with ethambutol. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products.

If you experience any of the following serious side effects, stop taking ethambutol and seek emergency medical attention or contact your doctor immediately:

• an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);

• vision changes (e.g., blurring, red-green color blindness);

• a rash;

• numbness or tingling in your fingers, toes, hands, or feet;

• confusion, disorientation, or hallucinations; or

• fever.

Other, less serious side effects may be more likely to occur. Continue to take ethambutol and talk to your doctor if you experience

• stomach upset, nausea, vomiting, abdominal pain, or decreased appetite;

• headache;

• mild dizziness;

• worsening gout; or

• joint pain.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.