Doxycycline 100mg is used to treat many different bacterial infections, such as acne, urinary tract infections, intestinal infections, respiratory infections, eye infections, gonorrhea, chlamydia, syphilis, periodontitis (gum disease), and others.

Doxycycline 100mg is used to treat a wide variety of bacterial infections, including those that cause acne. These can include some sexually transmitted diseases, skin infections, eye infections, respiratory infections, and more. It is also used as an add-on treatment for severe acne and to prevent malaria in people who plan to travel to areas with certain strains of malaria.