On the surface, Viread seemed to work like AZT and Zerit, but underneath it worked better.

FORBES: The Golden Age of Antiviral Drugs

More recently he had run antiviral research at Bristol-Myers, helping produce the second-ever HIV drug (Videx, in 1991), and the HIV drug Zerit.

FORBES: The Golden Age of Antiviral Drugs

Bristol-Myers was already selling two of top HIV-fighters: Zerit and Videx.

FORBES: Bristol-Myers Takes Off Its Makeup