Selvom rifampicin kan inducerer ritonavirs metabolisme, tyder begrænsede data på, at rifampicins øgede inducerende effekt (ved siden af ritonavirs egen) er lille og ikke har nogen klinisk relevant effekt på ritonavir- niveauer i højdosis enkeltstof- behandling.
Although rifampicin may induce metabolism of ritonavir, limited data indicate that when high doses of ritonavir (600 mg twice daily) is co-administered with rifampicin, the additional inducing effect of rifampicin (next to that of ritonavir itself) is small and may have no clinical relevant effect on ritonavir levels in high-dose ritonavir therapy.