View clinical trials related to Healthy Volunteers.
Filter by:Several studies showed that activity of down inhibitor bundle is weakened in different painful pathologies as the fibromyalgy or the trigeminal nevralgy. The purpose of the protocol is to study the working of down inhibitor bundle at patients suffering of neuropathic pain.
Paracetamol is one of the most commonly used drugs in the world, indicated for the symptomatic treatment of fever and pain of mild to moderate. More precisely, it is a drug used to relieve pain and reduce fever. The objective of this study is to analyze whether a placebo effect occurs when you take paracetamol for pain, ie if the analgesic effect of paracetamol is partly due to the simple fact of taking a drug. Moreover, during the study you propose to do a saliva sample, optional, for biological research, pharmacogenetics, to assess how paracetamol is processed and eliminated in your body..
This is a randomized study to assess whether the pharmacokinetics of a new single 750 mg tablet is similar to 3 x 250 mg tablets (750 mg total).
Background: - Central nicotinic acetylcholine receptors (nAChRs) are the primary target for the action of nicotine. In addition to being involved in tobacco dependence, they are also involved in a variety of brain disorders, including Alzheimer's and Parkinson's diseases. Researchers are interested in developing better ways to study the action of nAChRs to improve treatments for smoking cessation and other problems affected by these receptors. These new study methods may involve different radiotracers, which are drugs that can help show brain activity during positron emission tomography (PET) scanning. Objectives: - To evaluate the feasibility of using a radiotracer, 2-[18F]F-A-85380, in PET scanning of the brain. Eligibility: - Healthy volunteers between 21 and 45 years of age who do not use tobacco. Design: - Participants will be asked to avoid consuming alcohol or using a number of over-the-counter medications, including antihistamines, cough medicines, and nasal decongestants, for 5 days before the study day. Participants provide urine and breath samples at the start of the study to be tested for chemicals that may interfere with the study. - Participants will visit the clinical center the morning of the day before the scanning session to provide blood and urine samples as required. Participants will return and be admitted for an overnight stay later that afternoon or evening. - On the day of the study, participants will receive a single dose of the radiotracer 2-[18F]F-A-85380, and will have a series of PET scans over the next 7 hours and provide blood samples during that time. Participants will spend that night at the clinical center and leave on the morning after the end of the study. - Participants will return for follow-up visits 2 weeks and 1 month after the end of the study.
This is an exploratory study to evaluate the usefulness of fMRI as a biomarker to characterize the response to three centrally active drugs and placebo.
This study will evaluate the pharmacokinetics of ridaforolimus including the area under the concentration-time curve (AUC[0-infinity]) and maximum concentration (Cmax) after administration of a single dose of ridaforolimus in patients with moderate hepatic insufficiency and healthy matched control subjects.
This is a randomized, open-label, two-way cross-over drug-drug interaction Phase I trial. The objectives of this phase I trial are to investigate in healthy female subjects: - the effect of prucalopride on the absorption of ethinylestradiol and norethisterone acetate, the active constituents of several oral contraceptives, after the first dose of prucalopride. - the effect of multiple oral dosing of 2 mg prucalopride, for 6 days o.d. (steady state), on the pharmacokinetics of ethinylestradiol and norethisterone acetate. This trial will be conducted in healthy females of child bearing potential, i.e. females aged between 18 and 45 years (pre-menopausal).
Multiple center, double-blind, randomized, placebo-controlled study to see if it is safe to give ACHN-490 Injection for 5 consecutive days, to measure plasma pharmacokinetics, and to determine lung penetration of ACHN-490 (measured in ELF-epithelial lining fluid)after a single dose of ACHN-490 Injection in healthy volunteers.
The cytochrome P450 enzymes (CYP) are the major drug-metabolizing enzyme system in humans. A great inter- individual variability affects the activity of these enzymes, and consequently the plasma drug concentrations resulting in different pharmacodynamic effects and occurrence of effect sides. Environmental factors, diet, drugs or genetics are responsible for this variability. Genetic factors are very important since the majority of these enzymes are highly polymorphic. For example, over 80 CYP2D6 allelic variants have been discovered so far and are associated to the absence, a decrease, or an increase in enzyme activity. Most polymorphisms were detected by adverse reactions occurring in a group within the population after normal doses of drugs had been administrated. Those patients experiencing adverse reactions often had a reduced capability to metabolize certain drugs. In clinical therapy, this variability has important consequences including the lack of response to a treatment and/or adverse drug reactions. In order to reduce these potentially unwanted events possibly leading to sever adverse reactions or death, it might therefore be of decisive interest to be able to assess the activity of these enzymes at the individual level. Two approaches may be used to assess CYPs activities, genotype and phenotype. Genotype is based on DNA analysis and polymorphism detection. Phenotype consists of administration of "model" drug or probe drug metabolized by a specific CYP and a determination of a ratio between the drug and its metabolite in plasma or urine. The principal drawback of the phenotyping methods is the urine collection overnight or at least 8 hours after the administration of probe test. This procedure is very tedious and time consuming for the patient as well as for the medical staff. The test can be performed in plasma or blood 1-2 hours after probe administration. However, this procedure is invasive and needs an important volume of blood (6 ml). Recently, a novel approach has been developed for the quantitative determination of circulating drug concentrations using dried blood spots (DBS) on filter paper obtained with a simple finger prick. Due to the small blood volume required (about 10 µL) compared to conventional sampling, this minimally invasive method provides a patient-friendly alternative for blood collection in patient population where venous sampling is unethical or impossible (pediatrics). In addition, DBS sampling does not require the use of anticoagulant, plasma separation and decreases contact with infectious material. Furthermore, dried blood spots can be easily stored and shipped to analytical laboratories without using refrigerated devices. Thanks to the new developments in analytical techniques (mass spectrometry), which permit quantitative analysis from very small volume of blood. DBS sampling represents a powerful tool for the biomedical analyses, particularly in pharmacokinetic studies where several blood samples are needed and for phenotyping procedures.
The purpose is to show that 5 mg Form IV tablet of AG-013736 produces similar drug concentrations in plasma compared to 5 mg Form XLI tablet of AG-013736 after oral dosing under fed conditions.