View clinical trials related to Pharmacokinetics.
Filter by:In a prior in vitro study using human hepatocytes quinine was shown to induce the activity of Cytochrome p450 CYP 1A2. The present study will evaluate the extent to which quinine sulfate-related induction of this enzyme effects the pharmacokinetics of theophylline, a sensitive probe drug for the activity of CYP 1A2. It will also evaluate the effect of single-dose theophylline on the pharmacokinetics of steady-state quinine sulfate.
Metformin is widely used for treatment of type 2 diabetes mellitus. Side-effects are few and mainly from the gastrointestinal tract. Since metformin is cleared from the blood exclusively via the kidneys reduced renal function is a relative contraindication. We have earlier demonstrated that metformin safely can be used to a lower GFR level of 30 ml/min/1.73. Below that level the risk of lactacidosis, a severe complication, increases. In the present study we plan to analyse serum levels of metformin repeatedly in patients with moderate renal failure (CKD = GFR of 30-60 ml/min/1.73). Blood samples will be taken as trough values in the morning, week 0, 2, 4, and 8 and at four weeks a blood sample will be taken two hours after intake of the morning dose of metformin. Renal function will be estimated with creatinine and cystatin C at each occasion. The intraindividual variation of metformin will be calculated. The study rests on a new method for measuring metformin. The technique uses Liquid Chromatography Tandem Mass Spectometry (LCMSMS). Proteins are removed from serum by adding acetonitrile to the sample. After centrifugation a diluted portion of the supernatant is injected into the LCMSMS-system. The total runtime for a sample is 6 minutes. The study will show if variation in serum levels of metformin measured in the same patient is high or low and thus give us better understanding whether a change i serum level is due to biological variation or to increased retention caused by progressive renal failure.
The purpose of this study is to evaluate in healthy volunteers how much and how fast the new suspension compared to the commercial darunavir tablet, given in combination with low-dose ritonavir, are absorbed into the body (called the relative oral bioavailability).
Study to evaluate the PK of 25 mg and 50 mg of Proellex from 2 different suppliers in the fed and fasting states.
The purpose of the study is to investigate the safety, biodistribution, radiation dosimetry and pharmacokinetics of three intravenous escalating dose levels of Xofigo (Alpharadin).
The study will examine dexmedetomidine levels in the blood of critically ill intensive care patients to understand how it is broken down by the body.
Healthy subjects will take study drug by mouth twice a day for 7 consecutive days, blood and cervicovaginal samples will be taken most mornings around the AM dose. Two visits, ~14 hrs in length will be required on Day 1 and 7. The purpose of this study is to measure how much raltegravir is found in the genital tract after taking it orally.
The purpose of this study is to assess the interactions seen when somebody doses with TMC435350 and Rifampin (commercial form of antibiotic).
1. To estimate the absorption of a single oral dose of a controlled release varenicline tablet under fed and fasted conditions. 2. To evaluate the pharmacokinetics, safety, and tolerability of a single dose of a varenicline controlled release tablet under fed and fasted conditions.
1. Quantify how much PD-0332334 is removed from the blood with hemodialysis 2. Investigate the pharmacokinetics of a single dose of PD-0332334 in subjects receiving regular hemodialysis treatments. 3. Investigate the safety and tolerability of a single dose of PD-0332334 in subjects receiving hemodialysis.