Hydroxychloroquine for Discordant CD4 Responders on Highly Active Antiretroviral Therapy (HAART)

The purpose of the study is to examine the effects of adding a drug called hydroxychloroquine, usually used to treat rheumatoid arthritis, to patients' usual antiretroviral combination. HIV causes activation of some parts of the immune system and this immune activation may persist despite effective antiretroviral therapy. Ongoing activation may be responsible for poor CD4 rise on antiretroviral therapy and for some HIV-related complications. Drugs like hydroxychloroquine work by inhibiting immune activation. The study will primarily investigate the effect of adding this medication on immunological parameters (particularly CD4 count), on other safety parameters (such as cholesterol), patients' side effects and viral load. If you decide to take part, the duration of your involvement in the study will be 24 weeks plus two screening visits up to 84 days prior to the start of the study and a follow up visit.