I de kliniske studier blev isolater fra udvalgte patienter, som var behandlet med nelfinavir alene eller i kombination med reverse transcriptasehæmmere, monitoreret i 2 til 82 uger for fænotypiske (n=19) og genotypiske forandringer (n=195, heraf kunne 157 vurderes).
HIV isolates from selected patients treated with nelfinavir alone or in combination with reverse transcriptase inhibitors were monitored for phenotypic (n=19) and genotypic (n=195, 157 of which were assessable) changes in clinical trials over a period of 2 to 82 weeks.