En farmakokinetisk undersøgelse viste, at samtidig administration af 600 mg abacavir 2 gange daglig og metadon reducerede Cmax for abacavir med 35% og udsatte tmax med en time, men
7 Methadone: in a pharmacokinetic study, coadministration of 600 mg abacavir twice daily with methadone showed a 35% reduction in abacavir Cmax and a one hour delay in tmax but the AUC was unchanged.