Pharmacokinetic
Conditions
Keywords
rifaximin, midazolam, pharmacokinetics
Brief summary
The primary objective of this study is to determine if rifaximin, administered daily has an effect on the cytochrome P450 (CYP) isoenzyme 3A4, by examining any changes in the pharmacokinetics of midazolam (a CYP3A4 substrate), when co-administered.
Detailed description
This is a single-site, single-arm, open-label, drug-interaction study that examines the effect of rifaximin (RFX), 550 mg 3 times daily (TID; 1650 mg/day), on orally administered (PO) midazolam (MDZ) 2 mg (administered as a 2 mg dose in 1 mL of midazolam HCL Syrup; 2 mg/mL) when dosed for 7 and 14 consecutive days, respectively.
Interventions
DRUGrifaximin
550 mg TID
Sponsors
Bausch Health Americas, Inc.
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 45 Years
Healthy volunteers
Yes
Inclusion criteria
* Patient is medically normal * Patient has normal laboratory values * Patient has the ability to understand the requirements of the study
Exclusion criteria
* HIV * Hepatitis B * Hepatitis C * History of renal, hepatic, endocrine, oncological, gastrointestinal or cardiovascular disease. * History of epilepsy, asthma, diabetes, psychosis, glaucoma or severe head injury.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Individual midazolam and rifaximin plasma concentrations and pharmacokinetic parameters will be summarized. | 21 to 38 days (including a 21 day screening period) |
Secondary
| Measure | Time frame |
|---|---|
| Overall safety assessments will include the incidence, intensity, and type of adverse events, and clinically significant changes in the patient's physical examination, vital signs and laboratory results. | 21 tyo 38 days |
Outcome results
None listed