Comparative Study of Quinine Sulfate in Healthy Patients and in Patients With Renal Impairment

Inclusion Criteria: * All subjects - non-smoking, male and female volunteers 18-65 years of age weighing at least 60kg with BMI between 18- 40kg/m2. Females of childbearing potential sexually inactive or using acceptable birth control method for 14 days prior to through 3 days following dosing or postmenopausal with amenorrhea for at least 2 years, adequate venous access * Healthy subjects - medically healthy based on designated clinical criteria including CLcr\>80 ml/min and hemoglobin 11g/dL or greater * Renally-impaired subjects - medically acceptable based on designated clinical criteria including good glucose control if diabetic, CLcr 30 to 80 ml/min, hemoglobin 10 g/dL or greater, anticipation that medications necessary for treatment of renal disease and/or other coexisting disease will remain stable for 14 days prior to and throughout the study period Exclusion Criteria: * Pregnant or lactating; history of presence of significant cardiovascular, pulmonary, hepatic, hematologic, gastrointestinal, endocrine, immunologic, musculoskeletal, dermatologic, neurologic, or psychiatric disease; positive at screening for HIV, HbsAg, or HCV; QTc \>440 msec (male) or 450 msec (female) or PR \>200 msec, sitting BP \< 90/55, sitting radial pulse \< 45 bpm at screening or baseline; history of G6PD deficiency, myasthenia gravis, or optic neuritis; hypersensitivity or idiosyncratic reaction to mefloquine or quinidine; recent/ongoing use of drugs or substances known to inhibit or induce CYP P450 enzymes and/or P-glycoprotein or quinine; hx of alcoholism or drug abuse within previous 2 years; donation of blood or plasma within 56 days prior to dosing; receipt of study medication in another clinical trial within 30 days of dosing