Follow all directions on your prescription label. Your doctor may occasionally change your dose to make sure you get the best results. Do not take  ethambutol in larger or smaller amounts or for longer than recommended.
Tell your doctor if you have ever used tuberculosis medicine before. Your dose may be different if you have been treated for tuberculosis in the past.
You may take ethambutol with or without food.
Ethambutol may be taken with food if it upsets your stomach.
Tell your doctor if you have any changes in weight. Ethambutol doses are based on weight and your dose may also need to be changed.
Your vision will need to be checked often while you are taking ethambutol. If you wear glasses, take them with you to your vision examination.
Your blood cells, kidney function, and liver function may also need to be checked.
Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antibiotics. Ethambutol will not treat a viral infection such as the flu or a common cold.
Tuberculosis is sometimes treated with a combination of drugs. Use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice.
Store at room temperature away from moisture and heat.
 Detailed Ethambutol dosage information
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
