Drug - Drug Interaction Study of Quinine Sulfate and Ciprofloxacin
- Conditions
- Healthy
- Interventions
- Registration Number
- NCT00785980
- Lead Sponsor
- Mutual Pharmaceutical Company, Inc.
- Brief Summary
Ciprofloxacin is moderate inhibitor of cytochrome P450 1A2 (CYP1A2), one of the enzymes responsible for the metabolism of quinine. This study will evaluate the effect of ciprofloxacin-related inhibition of CYP1A2 on the pharmacokinetics of quinine sulfate.
- Detailed Description
Ciprofloxacin is moderate inhibitor of cytochrome P450 1A2 (CYP1A2), one of the enzymes responsible for the metabolism of quinine. This study will evaluate the effect of ciprofloxacin-related inhibition of CYP1A2 on the pharmacokinetics of quinine sulfate. In the morning on study Day 1 after a fast of at least 10 hours, twenty-four healthy, non-smoking, non-obese, non-pregnant adult volunteers between the ages of 18 and 45 will be given one oral dose of quinine sulfate (2 x 324 mg capsules). Fasting will continue for 4 hours after the dose. Blood samples will be drawn from all participants before dosing and for 36 hours post-dose at times sufficient to adequately define the pharmacokinetics of quinine sulfate. A 7-day washout period will be completed after the first dose of quinine sulfate on Day 1. Beginning at 07:45 am on Day 8 and continuing through Day 10, all subjects will return to the clinic for non-confined dosing of ciprofloxacin (1 x 500 mg tablet) every 12 hours. Administered ciprofloxacin doses on these days will not be in a fasted state. At 07:45 am on Day 11 after a fast of at least 10 hours, all study participants will receive a co-administered single oral dose of quinine sulfate (2 x 324 mg capsules) and ciprofloxacin (1 x 500 mg tablet). A final dose of ciprofloxacin (1 x 500 mg tablet) will be administered 12 hours later. Blood samples will be drawn from all participants before dosing and for 36 hours post-dose at times sufficient to adequately define the pharmacokinetics of quinine sulfate. Fasting will continue for 4 hours following the co-administered dose of quinine sulfate and ciprofloxacin. A further goal of this study is to evaluate the safety and tolerability of this regimen in healthy volunteers. Subjects will be monitored throughout participation in the study for adverse reactions to the study drug and/or procedures. Seated blood pressure and pulse will be measured pre-dose and at 1, 2 and 3 hours post-dose on Days 1 and 11. An electrocardiogram (ECG) will be done pre-dose and at 1, 2 and 4 hours post-dose on Days 1 and 11. All adverse events whether elicited by query, spontaneously reported, or observed by clinic staff will be evaluated by the Investigator and reported in the subject's case report form.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 24
- Healthy adults 18-45 years of age
- Non-smoking
- Non-pregnant (post-menopausal, surgically sterile or using effective contraceptive measures)
- Body mass index (BMI)between 18 and 32
- Medically healthy on the basis of medical history and physical examination
- Hemoglobin > or = to 11.5 g/dL
- Completion of the screening process within 28 days prior to dosing
- Provision of voluntary written informed consent
- Recent participation (within 28 days) in other research studies
- Recent significant blood donation or plasma donation
- Pregnant or lactating
- Test positive at screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HbsAg), or hepatitis C virus (HCV)
- Recent (2-year) history or evidence of alcoholism or drug abuse
- History or presence of significant cardiovascular, pulmonary, hepatic, gallbladder or biliary tract, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, or psychiatric disease
- Subjects who have used any drugs or substances known to inhibit or induce cytochrome (CYP) P450 enzymes and/or P-glycoprotein (P-gp) within 28 days prior to the first dose and throughout the study
- Drug allergies to mefloquine or quinidine
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Quinine Sulfate with Ciprofloxacin Quinine Sulfate Capsules 324 mg Quinine sulfate pharmacokinetics in the presence of steady state ciprofloxacin Quinine Sulfate with Ciprofloxacin Ciprofloxacin 500 mg Quinine sulfate pharmacokinetics in the presence of steady state ciprofloxacin Quinine Sulfate Quinine Sulfate Capsules 324 mg Baseline quinine sulfate pharmacokinetics
- Primary Outcome Measures
Name Time Method Maximum Plasma Concentration(Cmax) Serial pharmacokinetic blood samples for quinine sulfate collected on Days 1 and 11 before dosing and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 24 and 36 hours post-dose. The maximum or peak concentration that the drug reaches in the plasma.
Area Under the Concentration Versus Time Curve From Time 0 to Time t [AUC(0-t)] Serial pharmacokinetic blood samples for quinine sulfate collected on Days 1 and 11 before dosing and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 24 and 36 hours post-dose. The area under the plasma concentration versus time curve beginning from the first dose (time 0) to the last measurable concentration (time t), as calculated by the linear trapezoidal method.
Area Under the Concentration Time Curve From Time 0 Extrapolated to Infinity [AUC(0-∞)]. Serial pharmacokinetic blood samples for quinine sulfate collected on Days 1 and 11 before dosing and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 12, 24 and 36 hours post-dose. The area under the plasma concentration versus time curve from time 0 to infinity. AUC(0-∞)was calculated as the sum of the AUC(0-t) plus the ratio of the last measurable plasma concentration to the elimination rate constant.
- Secondary Outcome Measures
Name Time Method