This document discusses the classification, sites of action, and common side effects of antiretroviral drugs (ARVs) used to treat HIV/AIDS. It describes the main classes of ARVs which target different stages of the HIV lifecycle, including reverse transcriptase inhibitors, protease inhibitors, and entry inhibitors. Common side effects are outlined for different drug classes and specific drugs, such as peripheral neuropathy, lipodystrophy, hepatotoxicity, and rashes. Rare but serious side effects like lactic acidosis are also mentioned.