MedlinePlus: Doxycycline - Provides information on usage, precautions, side effects and brand names when available. Data provided by various government agencies and health-related organizations. - http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a682063.html
Doryx - Full prescribing information from RxList. - http://www.rxlist.com/cgi/generic/doxycyc.htm