Doxycycline is used to treat infections caused by bacteria and certain other infections spread by ticks, lice, mites, and infected animals. Doxycyline is also used to prevent malaria and to treat acne and rosacea (a skin disease that causes redness, flushing, and pimples on the face) 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 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. Doxycycline is a broad-spectrum antibiotic that is employed in the treatment of numerous bacterial infections. 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. Doxycycline oral tablets are used to treat bacterial infections and severe acne, and to prevent malaria. Learn about its side effects, warnings, dosage, and more. 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. View doxycycline information, including dose, uses, side-effects, pregnancy, breast feeding, monitoring requirements and directions for administration. Read on to learn about the common and rare side effects of doxycycline and how to manage them.