Doxycycline is an antibiotic in the tetracycline family. Its side effects range from mild stomach upset to rare but serious reactions. The most common doxycycline side effects are nausea, vomiting, diarrhea, stomach pain, heartburn, a sore or burning feeling in the throat or chest, sun sensitivity, headache, rash, and vaginal yeast infections. 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. NHS information about the medicine doxycycline, including what it's used for, who can take it, how to take it and side effects. Find patient medical information for Doxycycline on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Doxycycline is a tetracycline antibiotic used to treat many different bacterial infections such as acne, urinary tract infections, intestinal infections, and others. 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. View doxycycline information, including dose, uses, side-effects, pregnancy, breast feeding, monitoring requirements and directions for administration. Doxycycline is a prescription generic antibiotic medication indicated for the treatment of certain infections and diseases. Learn about side effects, drug interactions, dosages, warnings, and more. 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. 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.