Tetracycline HCl Capsules 500 mg USP 100 Count (Rx)Tetracycline HCl Capsules USP 500 mg is an antibiotic medication used to treat a variety of bacterial infections, including respiratory tract infections, skin infections, and urinary tract infections. It belongs to a class of antibiotics called tetracyclines, which work by preventing the growth and spread of bacteria. This medication should only be used to treat bacterial infections and will not work for viral infections such as the common cold or