Possible Clues:

• Much talked-about antiviral drug, briefly
• Anti-retroviral drug (Abbr.)
• Zidovudine, familiarly
• HIV drug sold under the names Zidovudine and Retrovir
• Pioneering anti-AIDS drug
• Combivir ingredient: Abbr.
• Aids med
• One name for the first antiretroviral HIV medication
• Drug taken in 'Rent'
• Drug sold under the brand name Retrovir