Abstract | AIMS: METHODS: Two phase 1, double-blind, placebo-controlled, parallel group studies were conducted in healthy volunteers (NCT00850044 and NCT00931281). Single dose study participants (n = 87) were randomized to one time administration of either paritaprevir or placebo, or paritaprevir with ritonavir or placebo. Participants (n = 38) enrolled in the multiple dose study received paritaprevir with ritonavir or placebo once or twice daily for 14 days. Pharmacokinetics, safety and tolerability were assessed throughout the study treatment periods. RESULTS: After single or multiple dose administration, paritaprevir displayed non-linear pharmacokinetics, with maximum plasma concentration and area under the plasma concentration-time curve increasing in a greater than dose proportional manner. Concomitant administration of 100 mg ritonavir increased paritaprevir exposure from a 300 mg dose approximately 30- to 50-fold and extended paritaprevir half-life. The tolerability of paritaprevir was similar with or without ritonavir. Asymptomatic, transient increases in bilirubin were observed but were not associated with abnormalities in other liver function tests. CONCLUSIONS:
Paritaprevir exhibits non-linear pharmacokinetics with greater than dose proportional increases in exposure after single or multiple dosing. Co-administration with ritonavir increases paritaprevir exposure and half-life without adversely influencing tolerability.
|
Authors | R M Menon, C E Klein, T J Podsadecki, Y-L Chiu, S Dutta, W M Awni |
Journal | British journal of clinical pharmacology
(Br J Clin Pharmacol)
Vol. 81
Issue 5
Pg. 929-40
(May 2016)
ISSN: 1365-2125 [Electronic] England |
PMID | 26710243
(Publication Type: Clinical Trial, Phase I, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
|
Copyright | © 2015 The British Pharmacological Society. |
Chemical References |
- Antiviral Agents
- Cyclopropanes
- Cytochrome P-450 CYP3A Inhibitors
- Lactams, Macrocyclic
- Macrocyclic Compounds
- Sulfonamides
- Proline
- Ritonavir
- paritaprevir
- Bilirubin
|
Topics |
- Adult
- Antiviral Agents
(adverse effects, pharmacokinetics)
- Bilirubin
(blood)
- Cyclopropanes
- Cytochrome P-450 CYP3A Inhibitors
(administration & dosage, adverse effects, pharmacokinetics)
- Double-Blind Method
- Drug Interactions
- Drug Therapy, Combination
- Female
- Half-Life
- Healthy Volunteers
- Hepatitis C, Chronic
(drug therapy)
- Humans
- Lactams, Macrocyclic
- Macrocyclic Compounds
(adverse effects, pharmacokinetics, therapeutic use)
- Male
- Middle Aged
- Proline
(analogs & derivatives)
- Ritonavir
(administration & dosage, adverse effects, pharmacokinetics)
- Sulfonamides
- Young Adult
|