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. Learn about the side effects of doxycycline, from common to rare, for consumers and healthcare professionals. Evidence-based academic monograph on Doxycycline, a tetracycline-class bacteriostatic antibiotic, from the Institute for Antimicrobial Research and Pharmacology. 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. Doxycycline is the workhorse antibiotic for a remarkable range of infections—acne, Lyme disease, chlamydia, community-acquired pneumonia, MRSA skin infections, malaria prevention—and each indication comes with its own course length, food rules, and patient instructions that often get compressed into a two-minute pharmacy counseling moment. 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 (Oracea, Doryx) is a prescription antibiotic that treats many types of infections. Common doxycycline side effects include nausea and sun sensitivity. Yeast infections are also possible. Doxycycline can irritate or damage your throat if you don’t take it properly. Be sure to take each dose with a full glass of water and remain upright for at least 30 minutes after taking it to. Find patient medical information for Doxycycline on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings 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 a tetracycline antibiotic used to treat many different bacterial infections such as acne, urinary tract infections, intestinal infections, and others.