NHS information about the medicine doxycycline, including what it's used for, who can take it, how to take it and side effects. Doxycycline, sold under the brand names Vibramycin and Doryx, among others, is a broad-spectrum antibiotic of the tetracycline class used in the treatment of infections caused by bacteria and certain parasites. [1] It is used to treat bacterial pneumonia, acne, chlamydia infections, Lyme disease, cholera, typhus, and syphilis, [1] and is sometimes used to prevent malaria. [2][3] Doxycycline. Doxycycline is a tetracycline antibiotic used to treat many different bacterial infections such as acne, urinary tract infections, intestinal infections, and others. Doxycycline remains a powerful tool against many infections, but correct dosing is essential for safety and effectiveness. Understanding how much to take, when, and for how long can make a big difference in your treatment outcome. Doxycycline capsules, delayed-release capsules, delayed-release tablets, and tablets and Acticlate® Cap capsules are also used to prevent malaria and treat anthrax infection after possible exposure and other conditions as determined by your doctor. Doxycycline belongs to the class of medicines known as tetracycline antibiotics. Learn about the side effects of doxycycline, from common to rare, for consumers and healthcare professionals. View doxycycline information, including dose, uses, side-effects, pregnancy, breast feeding, monitoring requirements and directions for administration. 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) Doxycycline is in a class of medications called tetracycline antibiotics. It works to treat infections by. What is Doxycycline? 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. It works by preventing the growth and spread of bacteria in the. Find patient medical information for Doxycycline on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.