In the patients with HIV that was resistant to four other protease inhibitors, patients taking Agenerase with ritonavir had a greater fall in viral load after four weeks than those continuing to take their previous protease inhibitors: half of those taking Agenerase with ritonavir had viral loads below 400 copies/ ml, compared with none of those continuing to take their previous protease inhibitors.
Dette var ikke tilfældet hos nogen af dem, der fortsatte med at tage de samme proteasehæmmere.