Over the last 2 decades, human immunodeficiency virus (HIV) illness has transformed to a chronic disease model. However, challenges, including the effects of co-morbid illnesses and the challenge of preventing future spread of the disease, continue to confront those infected with HIV. Addictions remain an important problem and a serious contributor to overall morbidity and mortality in this population. This book chapter seeks to illustrate the new developments in the treatment of these addictions as well as provide an overview of the medical updates regarding HIV and hepatitis C virus exposure prophylaxis and how they relate to the consultant psychiatrist.