The Types segmentation categorizes antiretroviral agents into five mechanistic classes: nucleoside reverse transcriptase inhibitors (NRTIs), non‑nucleoside reverse transcriptase inhibitors (NNRTIs), protease inhibitors (PIs), integrase strand transfer inhibitors (INSTIs), and entry inhibitors. NRTIs and NNRTIs together constitute roughly 55 % of the market, driven by their long‑standing inclusion in first‑line fixed‑dose combinations. Protease inhibitors, representing about 20 %, maintain relevance in second‑line regimens due to their high barrier to resistance. INSTIs have surged to capture approximately 20 % of market share, reflecting their superior efficacy and safety profiles that are reshaping treatment guidelines. Entry inhibitors, a niche class at roughly 5 %, are reserved for highly resistant cases and contribute to the market’s premium segment. Understanding this market taxonomy of drug types enables analysts to assess pipeline opportunities, pricing dynamics, and the impact of emerging generics on each class’s contribution to overall market size.