Det er desuden vist in vitro, at abacavir ikke hæmmer CYP 3A4, CYP 2C9 eller CYP 2D6 enzymerne i klinisk relevante koncentrationer.
Abacavir has also been shown in vitro not to inhibit CYP 3A4, CYP 2C9 or CYP 2D6 enzymes at clinically relevant concentrations.