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JAIDS Journal of Acquired Immune Deficiency Syndromes:
doi: 10.1097/QAI.0000000000000011
Clinical Science

Safety and Pharmacokinetics of the HIV-1 Protease Inhibitor TMC310911 Coadministered With Ritonavir in Healthy Participants: Results From 2 Phase 1 Studies

Hoetelmans, Richard M.W. PhD*; Dierynck, Inge PhD*; Smyej, Ilham MD*; Meyvisch, Paul PhD*; Jacquemyn, Bert MSc*; Marien, Kris MSc*; Simmen, Kenneth PhD; Verloes, Rene MD*

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Objectives: To evaluate safety, tolerability, and pharmacokinetics of TMC310911, a novel human immunodeficiency virus type-1 protease inhibitor.

Methods: Healthy participants aged 18–55 years with body mass index 18–30 kg/m2 were enrolled in 2 phase 1 studies. In the first-in-human, single-dose study, 18 participants received placebo or TMC310911 (75–2000 mg) in the double-blind phase and 8 participants received 300 or 600 mg of TMC310911 [administered alone or with 100 mg ritonavir twice daily (bid)] in the subsequent open-label phase. The multiple-dose double-blind study included 5 successive treatment sessions wherein healthy participants received placebo or TMC310911 [300 mg bid, 600 mg once daily or 150 mg bid (plus 100 mg ritonavir bid), 900 mg bid (alone) or 300 mg bid (plus ritonavir 50 mg bid)]; in all sessions, TMC310911 and ritonavir were administered for 6 and 9 days, respectively.

Results: In the single-dose study, no dose-limiting toxicity was observed up to 2000 mg of TMC310911. Systemic exposure to TMC310911 generally increased in a dose-proportional manner after the single- or multiple-dose administrations. Coadministration of ritonavir increased the systemic exposure to TMC310911. The mean Cmax and area under plasma concentration–time curve values (single-dose: 1200 mg TMC310911) were higher under fasted conditions than in fed condition. In both studies, most treatment-emergent adverse events were related to gastrointestinal system.

Conclusions: TMC310911 exhibited a linear pharmacokinetic profile after the single- (up to 2000 mg) and multiple-dose (up to 900 mg) administrations; ritonavir improved the pharmacokinetic profile of TMC310911. TMC310911 was generally safe and tolerable when administered with or without ritonavir.

© 2014 by Lippincott Williams & Wilkins


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