The drug Ritonavir also inhibits CYP3A and when they used it together with Telaprevir, the drug levels of Telaprevir increased by 15 fold.
Pharmacokinetic enhancement of the hepatitis
C virus protease inhibitors VX-950 and
SCH 503034 by co-dosing with ritonavir.
Kempf DJ, Klein C, Chen HJ, Klein LL, Yeung C, Randolph JT, Lau YY, Chovan LE, Guan Z, Hernandez L, Turner TM, Dandliker PJ, Marsh KC.