What is Doxycycline for?

Doxycycline is an antibiotic that is used in the treatment of various infections caused by unusual organisms, including Mycoplasma, Chlamydia, Rickettsia, and Borellia burgdorferi. It is used in the treatment of gonorrhea and syphilis in patients who are allergic to penicillin. It is also used in the treatment of anthrax and acne.