What is Ethambutol? Uses, warnings & side effects

Updated May 14, 2025  •  Published Dec 30, 2020

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Ethambutol overview

BRAND NAMES:

  • Myambutol

Generic Names:

  • Ethambutol Hcl

Uses:

  • Treats tuberculosis (TB).

Therapeutic Classes:

  • Antitubercular

Forms:

  • Tablet

How it’s taken:

  • By mouth

What is Ethambutol used for?

Myambutol is an antibiotic that treats bacterial infections. It is also used with other medications to treat tuberculosis (TB). It works by stopping the growth of bacteria.

What form(s) does Ethambutol come in?

  • Tablet

What are common Ethambutol dosages?

  • Tablet 100MG

  • Tablet 400MG

Ethambutol images - What does Ethambutol look like?

  • Ethambutol HCl
    100mg tablet

  • Ethambutol HCl
    400mg tablet

How to take Ethambutol

  • Take this medicine on a regular schedule. Keep taking it even if you are feeling better. Your doctor will tell you when you can stop taking it.

  • Ethambutol can be taken with food to avoid stomach upset.

  • Your doctor will tell you how much medicine to take and how often.

  • Take this medicine on a regular schedule. Keep taking it even if you are feeling better. Your doctor will tell you when you can stop taking it.

  • Ethambutol can be taken with food to avoid stomach upset.

  • Your doctor will tell you how much medicine to take and how often.

What to do if you miss a dose of Ethambutol

  • Take the missed dose as soon as possible.

  • Skip the missed dose if it is almost time for your next regular dose.

  • You should not use two doses at the same time.

Ethambutol contraindications - Who shouldn't take Ethambutol?

  • You should not use this medicine if you have ever had an allergic reaction to ethambutol or if you have damaged eye nerves (optic neuritis).

Ethambutol warnings

  • Wheezing or trouble breathing

  • Hives

  • This medicine may cause blurred vision. If it does, avoid driving or using dangerous machinery.

  • Check with your doctor before taking ethambutol if you have gout, kidney disease, or liver disease.

  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.

  • Skin rash

  • Joint pain

  • Fever or chills

  • Numbness, pain, or tingling in hands or feet

Ethambutol interactions & what to avoid when taking Ethambutol

  • This medicine may cause blurred vision. If it does, avoid driving or using dangerous machinery.

  • Check with your doctor before taking ethambutol if you have gout, kidney disease, or liver disease.

  • If you are pregnant or breastfeeding, talk to your doctor before taking this medicine.

Ethambutol side effects - How does Ethambutol make you feel?

Serious Side Effects

  • Numbness, pain, or tingling in hands or feet

  • Skin rash

  • Fever or chills

  • Wheezing or trouble breathing

  • Hives

  • Swelling of face, lips, throat

  • Eye pain

  • Any vision changes such as blurring, color blindness, trouble seeing

  • Joint pain

Less Serious Side Effects

  • Nausea and vomiting

  • Dizziness

  • Headache

  • Stomach pain

  • Poor appetite

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