Doxycycline hydrochloride is a tetracycline antibiotic commonly prescribed to treat bacterial infections. It is highly effective against a broad spectrum of Gram-positive and Gram-negative bacteria, as well as certain protozoa. Doxycycline hydrochloride works by inhibiting protein synthesis in bacteria, leading to the disruption of bacterial growth and eventual elimination. This medication is available in various forms, including capsules, tablets, and oral suspensions, for ease of administration.