what is doxycycline
doxycycline is an antibiotic used for treating bacterial infections the drug is also sold under the brand names oracea doryx monodox periostat and vibramycin doxycycline is in a class of medications called tetracyclines and it s a broad spectrum antibiotic which means it works against a wide range of bacteria doxycycline can be used for a number of different infections as follows acne anthrax gum diseases and rosacea as well as bacterial infections such as chlamydia typhus tick bites pneumonia syphilis gonorrhea lyme disease plaque malaria and some urinary tract infections