what is doxycycline mono
doxycycline monohydrate. DOXYCYCLINE is a tetracycline antibiotic. It kills certain bacteria or stops their growth. It is used to treat many kinds of infections, like dental, skin, respiratory, and urinary tract infections.It also treats acne, Lyme disease, malaria, and certain sexually transmitted infections.t is used to treat many kinds of infections, like dental, skin, respiratory, and urinary tract infections. It also treats acne, Lyme disease, malaria, and certain sexually transmitted infections.