In the paediatric studies APV20003 and APV29005, 67 PI-experienced patients were treated with fosamprenavir / ritonavir and of 22 virological failure isolates genotyped, nine patients were found with treatment-emergent protease mutations.
Lapsia koskeneissa tutkimuksissa APV20002, APV20003 ja APV29005 70 aikaisemmin proteaasi - inhibiittoreita saanutta potilasta sai fosamprenaviiria ja ritonaviiria.