Tetracycline is an antibiotic used to treat a number of bacterial infections. It is commonly used to treat acne and rosacea. Historically it was important in reducing the number of deaths from cholera. The term tetracycline is also used to denote the four-ring system of this compound tetracyclines are related substances that contain the same four-ring system.

For R&D use onlynot for drug household or other uses.

Tetracycline is a broad-spectrum antibiotic exhibiting activity against a wide range of gram-positive and gram-negative bacteria.