Samtidig administration af Ritonavir vil sandsynligvis resulterer i forhøjede plasmakoncentrationer af meperidine, piroxicam, og propoxyphene og er derfor kontraindiceret (se pkt 4. 3).
Ritonavir co-administration is likely to result in increased plasma concentrations of meperidine, piroxicam, and propoxyphene and is therefore contraindicated (see section 4.3).