Ethionamide is an antibiotic. It prevents the growth of bacteria in your body.

Ethionamide is used to treat tuberculosis (TB).

Ethionamide may also be used for purposes other than those listed in this medication guide.

Take all of the ethionamide 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.

Ethionamide may cause stomach upset, a loss of appetite, a metallic taste in your mouth, or excessive salivation (mouth watering). Notify your doctor if these side effects are persistent or severe.

Before taking this medication, tell your doctor if you

• have ever had an allergic reaction to ethionamide;

• have liver disease; or

• have diabetes mellitus.

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

It is not known whether ethionamide will harm an unborn baby. Do not take this medication without first talking to your doctor if you are pregnant.

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