View clinical trials related to Pharmacokinetics.
Filter by:This study is designed to compare the systemic exposure of orally inhaled beclomethasone dipropionate inhalation aerosol delivered via BAI to that delivered via MDI.
The death rate in children from the invasive fungal infection called aspergillosis is more than 50%. Voriconazole is the first-line therapy for this infection. In a previous publication the investigators have shown a highly significant relationship between voriconazole plasma concentrations and survival. However, voriconazole dosing is currently poorly established, and plasma drug exposure varies between children by 400% or more, even after intravenous dosing. The objective of this study is to investigate the reasons for this variability in voriconazole pharmacokinetics (PK).In two studies, the investigators will enroll 80 children/adolescents receiving oral or intravenous voriconazole, divided by age under 2 years (n=15), and 2-18 years (n=65). From each patient the investigators will collect the following: 1) a blood sample for detection of several genetic changes known to affect drug metabolizing enzyme (DME) activity; 2) up to 9 blood samples after a voriconazole dose for measurement of voriconazole ("PK sampling"); 3) follow-up samples after each PK sampling visit if necessary to adjust the dose so that voriconazole concentrations in the blood are satisfactory (known as therapeutic drug monitoring or TDM). At the time of the voriconazole dose prior to the PK sampling, we will also give single IV or oral (corresponding to the route of voriconazole administration) low doses of esomeprazole (an antacid), midazolam (a sedative), and ranitidine (an antacid) as a cocktail to test or probe DME activity. All of these medications are used commonly in children already. The investigators will estimate DME activity or phenotype using ratios of probe drug metabolite to parent drug concentrations, while simultaneously quantifying the amount of DME genetic material (mRNA) and protein in white blood cells. The investigators will test associations between DME activity, mRNA, protein, voriconazole PK, age, sex, and degree of illness. The investigators will also use a computer program to integrate all these data to develop a comprehensive model that will predict blood concentrations of voriconazole in children of all ages, as well as assist physicians and pharmacists to dose voriconazole more accurately.The total study duration for each subject will be until after the TDM follow up visit, generally about one week.
To determine the tolerability and pharmacokinetics (PK) of a single dose of Androxal in healthy adult male subjects as the dose to be investigated in a thorough QT interval/corrected QT interval (QT/QTc) study.
This study investigates how ASP3652 is taken up, broken down, and distributed through the body and excreted in individuals of different races. The study also investigates levels of biochemical markers in the bloodstream, and determines how safe the study drug is and how well it is tolerated after dosing. A further aim is to look at how the processes of metabolism, distribution and excretion of the study drug are possibly altered by the daily diet of the volunteers taking part.
A study of ACT-462206 to evaluate the tolerability, safety, pharmacokinetics, and pharmacodynamic of ascending single doses of ACT-462206, a novel dual orexin receptor antagonist in healthy male subjects.
A study to assess the amount of drug in the blood of young to middle aged, healthy, male subjects after they received the final formulation of EC905 compared to solifenacin (Vesicare®) and tamsulosin OCAS (Omnic OCAS®). Subjects are given a single dose of the combination tablet EC905, Vesicare® and Omnic OCAS® in 3 separate periods.
To evaluate the effect of food (low and high fat breakfast vs. fasting) on the pharmacokinetics (what the body does to the drug) of a single dose of solifenacin and tamsulosin administered as combination tablet EC905. Also to evaluate the safety and tolerability of single doses of EC905 in young, healthy male subjects, when administered under fed (low and high fat) or fasting conditions.
Tamsulosin (sold under the name Omnic OCAS) is used for treatment of voiding complaints related to an enlarged prostate. Solifenacin (sold under the name Vesicare) is used for the treatment of patients suffering from problems related to overactive bladder, such as needing to go to the toilet frequently and often having a sudden urgent need to go to the toilet. Certain patients with an enlarged prostate have complaints that may benefit from a combination of tamsulosin and solifenacin. EC905 is a single tablet containing both tamsulosin and solifenacin. The current study aims at investigating how tamsulosin and solifenacin are taken up from the intestine, distributed through the body and eventually eliminated from the body when taken as a single EC905 tablet.
Study will evaluate the vaginal and blood pharmacokinetics of dapivirine from a vaginal ring containing 25 mg worn for 1, 2, 4, 8 or 12 months.
A study to assess possible drug-drug interactions between MDV3100 and gemfibrozil and MDV3100 and Itraconazole.