Abstract: Two patients showed some evidence of
PI resistance during transient HIV RNA elevations: one patient in the monotherapy arm had a single DRV mutation (
L33F) when HIV RNA was 63 copies/ml (the virus was phenotypically sensitive to DRV [fold change 0.8]) and one
PI pretreated patient taking tenofovir disoproxil fumarate/emtricitabine/DRV/r had re-emergence of pre-existing
NRTI (
M184V) and
PI (
V82I and
L90M) mutations after a short treatment interruption (this virus remained phenotypically sensitive to DRV/r).