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Is Sulfamethoxazole vegetarian?

Sulfamethoxazole

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Vegan Vegan

Sulfamethoxazole is a synthetic sulfonamide antibiotic used to treat bacterial infections such as urinary tract infections, bronchitis, and prostatitis, often in combination with trimethoprim.

Also known as Sulfanilamide, N1-(5-methyl-3-isoxazolyl)-
INCI name Sulfamethoxazole
CAS number 723-46-6
EC number 211-963-3
CosIng ID 81583
Last reviewed 4 July 2026

An ingredient is considered vegetarian if it avoids components derived from killing an animal.

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