sulfamethoxazole, Gantanol, Gantanol DS

Pharmacy Author:
Medical and Pharmacy Editor:

GENERIC NAME: sulfamethoxazole (discontinued)


DRUG CLASS AND MECHANISM: Sulfamethoxazole is an anti- bacterial sulfonamide. It prevents the formation of dihydrofolic acid, a compound that bacteria must be able to make in order to survive. Although it was once a very useful antibiotic, it is almost obsolete as a single agent today due to the development of bacterial resistance to its effects. Sulfamethoxazole is now used primarily in combination with trimethoprim, a combination product known as Bactrim or Septra. Sulfamethoxazole was approved by the FDA in 1961. According to the FDA database, all brand and generic formulations of sulfamethoxazole have been discontinued.

PRESCRIBED FOR: Sulfamethoxazole is used for the treatment of malaria (in combination with quinine sulfate and pyrimethamine), conjunctivitis (inflammation of the conjunctiva of the eye) due to chlamydia, toxoplasmosis (in combination with pyrimethamine), and urinary tract infections (UTI).

Medically Reviewed by a Doctor on 9/15/2015

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Finder Tool

Need help identifying pills and medications?
Use the pill identifier tool on RxList.

Back to Medications Index

Health Solutions From Our Sponsors