Det er desuden vist in vitro, at abacavir ikke hæmmer CYP 3A4, CYP2C9 eller CYP2D6 enzymerne i klinisk relevante koncentrationer.
Abacavir has also been shown in vitro not to inhibit CYP 3A4, CYP2C9 or CYP2D6 enzymes at clinically relevant concentrations.