Doxycycline is a versatile antibiotic used to treat various infections, including respiratory, skin, and sexually transmitted infections. Dosage varies based on the condition being treated, age, and patient-specific factors. Doxycycline is an antibiotic that belongs to the tetracycline class of drugs. It was first approved for medical use in the 1960s and has since become one of the most prescribed antibiotics worldwide. Doxycycline is broad-spectrum, meaning it can target and kill a wide variety of bacteria. NHS information about the medicine doxycycline, including what it's used for, who can take it, how to take it and side effects. Doxycycline is an antibiotic that is commonly used to prevent malaria, improve tooth attachment and reduce gum pockets in people who have a dental procedure called scaling and root planing for. Doxycycline is a broad-spectrum antibiotic that is employed in the treatment of numerous bacterial infections. Doxycycline is a tetracycline antibiotic that inhibits bacterial growth and is thought to have anti-inflammatory effects. Doxycycline is used for bacterial infections, including acne, rosacea, urinary and respiratory tract infections, eye infections, gum disease, gonorrhea, chlamydia, and syphilis. Learn about the side effects of doxycycline, from common to rare, for consumers and healthcare professionals. Doxycycline is used to treat bacterial infections in many different parts of the body. It is also used to treat pimples and abscesses (usually on the face) that are caused by rosacea, also known as acne rosacea or adult acne. Doxycycline is a prescription antibiotic used to treat a wide variety of bacterial infections — including respiratory tract infections, acne, urinary tract infections, certain sexually transmitted infections (STIs), and tick-borne illnesses like Lyme disease. Read on to learn about the common and rare side effects of doxycycline and how to manage them.