Yderligere to undersøgelser vurderede virkningen af Zerit taget i kombination med lamivudin og efavirenz (andre antivirale lægemidler) hos 467 behandlingsnaive patienter (dvs. ikke tidligere behandlet for hiv- infektion).
Two further studies assessed the effectiveness of Zerit, taken in combination with lamivudine and efavirenz (other antiviral medicines) in 467 treatment-naïve patients (who had not taken treatment for HIV infection before).