Doxycycline is used to treat bacterial infections in many different parts of the body. It is also used to treat pimples and abscesses (usually on the face) that are caused by rosacea, also known as acne rosacea or adult acne. It works to treat acne by killing the bacteria that infects pores and by lowering the amount of oil on your skin that can cause acne. It works to treat rosacea by decreasing inflammation. Antibiotics such as doxycycline will not work for colds, flu, or other viral infections. Doxycycline is an antibiotic used to treat bacterial infections and prevent malaria. Common side effects include upset stomach, indigestion, tummy pain, diarrhoea, and headache. It is observed that doxycycline exerts its anti-inflammatory effects by inhibiting neutrophil chemotaxis and oxidative bursts, which are common mechanisms involved in inflammation and ROS activity in rosacea and acne. NHS information about the medicine doxycycline, including what it's used for, who can take it, how to take it and side effects. Doxycycline oral tablets are used to treat bacterial infections and severe acne, and to prevent malaria. Learn about its side effects, warnings, dosage, and more. Doxycycline is a tetracycline antibiotic that inhibits bacterial growth and is thought to have anti-inflammatory effects. Doxycycline is used for bacterial infections, including acne, rosacea, urinary and respiratory tract infections, eye infections, gum disease, gonorrhea, chlamydia, and syphilis. Read on to learn about the common and rare side effects of doxycycline and how to manage them. What are the serious side effects of doxycycline? While less common, the most serious side effects of doxycycline are described below, along with what to do if they happen. Learn about the side effects of doxycycline, from common to rare, for consumers and healthcare professionals.