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Ethambutol HCl oral

Important Note

The following information is intended to supplement, not substitute for, the expertise and judgment of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that use of the drug is safe, appropriate, or effective for you. Consult your healthcare professional before using this drug.





Ethambutol is used to treat tuberculosis, often in combination with other medications.



This medication may also be used to treat an infection known as "MAC" (Mycobacterium avium complex).

How To Use

This works best when taken with food or milk to prevent stomach upset. Take as directed. Do not stop taking this medication without your doctor's approval. Stopping therapy too early may result in ineffective treatment.

Side Effects

May cause stomach upset, dizziness, fatigue, or headache. These effects should disappear as your body adjusts to the medication. Notify your doctor if you experience: vision changes, skin rash, numbness or tingling of the hands or feet. This medication may cause blurred vision or make it difficult to see red or green colors. Report any vision changes to your doctor. Eye tests may be done. If you notice other effects not listed above, contact your doctor or pharmacist.


Tell your doctor if you have a history of: gout, kidney disease, vision problems such as cataracts. Before taking this medication, tell your doctor if you are pregnant. Ethambutol is excreted into breast milk. Though, to date, no problems have been noted in nursing infants, consult your doctor before you breast-feed.

Drug Interactions

Tell your doctor of all prescription and nonprescription drugs you may use, especially: antacids. Antacids may decrease the absorption of this drug. Therefore, space antacid doses several hours apart from ethambutol doses. Do not start or stop any medicine without doctor or pharmacist approval.


If overdose is suspected, contact your local poison control center or emergency room immediately.


Do not share this medication with others.

Missed Dose

If you miss a dose, take as soon as remembered; do not take if it is almost time for the next dose, instead, skip the missed dose and resume your usual dosing schedule. Do not "double-up" the dose to catch up.


Store at room temperature between 59 and 86 degrees F (between 15 and 30 degrees C) away from moisture and sunlight. Do not store in the bathroom.