Doxycycline is a tetracycline antibiotic. Doxycycline is used to treat a wide range of bacterial illnesses, including acne, urinary tract infections, intestinal infections, lung infections, and eye infections. Doxycycline works by stopping the growth of bacteria when treating bacterial infections and is also thought to have an anti-inflammatory action when used for other conditions. Some doxycycline formulations are used to prevent malaria, cure anthrax, and treat infections caused by mites, ticks, or lice. There may be some mild side effects of Doxycycline Capsule like vomiting, nausea, and diarrhea.