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What should I discuss with my healthcare provider before taking ethambutol (Myambutol)?

Before taking this medication, tell your doctor if you have

• ever had an allergic reaction to ethambutol;
• cataracts, diabetic retinopathy, or optic neuritis; or
• kidney disease.

You may not be able to take ethambutol, or you may require a dosage adjustment or special monitoring during treatment if you have any of the conditions listed above.

It is not known whether ethambutol will be harmful to an unborn baby. Do not take this medication without first talking to your doctor if you are pregnant or could become pregnant during treatment.

It is also not known whether ethambutol will be harmful to a nursing baby. Do not take this medication without first talking to your doctor if you are breast-feeding a baby.

How should I take ethambutol (Myambutol)?

Take ethambutol exactly as directed by your doctor. If you do not understand these instructions, ask your pharmacist, nurse, or doctor to explain them to you.

Take each dose with a full glass (8 ounces) of water.

Ethambutol can be taken with or without food. Taking ethambutol with food may decrease stomach upset.

Take all of the ethambutol that has been prescribed for you even if you begin to feel better. Your symptoms may begin to improve before the infection is completely treated.

Ethambutol is usually combined with one or more other tuberculosis medicines.

Store this medication at room temperature away from moisture and heat.

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