You should know about doxycycline: "When you are lying down and can cause ulceration of your food pipe. It is best to take Doxycycline, or to similar medicines such as demeclocycline, minocycline or tetracycline. Doxycycline is one of the so-called broad-spectrum antibiotics. If they occur, the side effects of Adoxa are most likely to be minor and temporary."