An antiretroviral drug for HIV, methadone for heroin addiction, a birth control pill and an antidepressant. For some AIDS patients, this is a daily medication regimen. How do all of these substances affect how HIV drugs work and how do HIV drugs, in turn, affect the other drugs a patient takes? That question is at the heart of research being conducted by the Âé¶¹´«Ã½o's Laboratory for Antiviral Research, where researchers are developing innovative new methods of testing the blood and cells of HIV patients for these interactions.