This application provides health care professionals with: 1) current and comprehensive drug information on HIV and hepatitis C (HCV) drugs; and 2) a drug-drug interaction function to check for interactions between HIV/HCV drugs and other commonly used medications to treat comorbidities and other conditions. This free application is a is part of the Toronto General Hospital, University Health Network Immunodeficiency Clinic website ( http://www.hivclinic.ca.) The app is maintained and edited by members of The Canadian HIV/AIDS Pharmacists Network (CHAP). The app content is updated regularly, and includes information from key international HIV/HCV conferences and recent publications in the medical/pharmacy literature. Contact us at: [email protected].