How many lives did the aids drug 3tc (lamivudine) save?

Unable to estimate. It is difficult to estimate how many lives a specific anti-hiv drug like 3tc (lamivudine) saved. This is because 3tc (lamivudine) is often one of three drugs used in an HIV drug regimen or "cocktail". The combination of 3 drugs, also called haart, or highly active anti-retroviral therapy, has saved many lives throughout the entire world and remains the mainstay of treatment.