Learn about the side effects of doxycycline, from common to rare, for consumers and healthcare professionals. Doxycycline hyclate and doxycycline monohydrate are different forms of the same antibiotic. But is one better? Read about the differences in side effects and more. Can dogs take Doxycycline? Here's everything you need to know about what Doxycycline is used for in dogs. Always consult your veterinarian first. Read on to learn about the common and rare side effects of doxycycline and how to manage them. Know what Doxycycline Hyclate is used for, how to take it, and which side effects to expect when starting it. Most people will get 100 mg tablets of doxycycline hyclate if they have potentially been exposed to anthrax. You need these items to make doses of doxycycline for those who can't swallow pills: Doxycycline is used for bacterial infections, including acne, rosacea, urinary and respiratory tract infections, eye infections, gum disease, gonorrhea, chlamydia, and syphilis. Doxycycline can also be used to prevent malaria and treat infections caused by mites, ticks, or lice. To reduce the development of drug-resistant bacteria and maintain the effectiveness of doxycycline hyclate and other antibacterial drugs, doxycycline hyclate should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria. 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. Find patient medical information for Doxycycline on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings.