View clinical trials related to Healthy Volunteers.
Filter by:The purpose of this study is to evaluate how safe LY3006072 (study drug) is and whether it causes any side effects. The study will also measure how much of the study drug gets into the blood stream and how long it takes the body to get rid of the study drug. The study drug will be given in the morning or evening with or without a meal. This is the first time that this study drug is being given to humans. This study is for research purposes only and is not intended to treat any medical condition.
The purposes of this study are to look at safety, how well the study drug is tolerated, how much of the study drug gets into the blood stream, and how long it takes the body to get rid of it when given to healthy Japanese and non-Japanese participants as multiple doses. In addition, effects of 28-day oral dosing of LY3031207 on the amount of a cholesterol-lowering drug (simvastatin) that gets into the blood stream and how long the body takes to get rid of it will be determined. The effects of LY3031207 after single and 28-day dosing on blood pressure will also be studied. Information about any side effects that may occur will be collected.
The purpose of this study is to examine the safety, tolerability, immunogenicity and the way the body absorbs, distributes, breaks down and excretes various increasing single and multiple subcutaneous doses of PA401 in healthy subjects. This study will also look at the effect of PA401 on inflammation in the lungs following an inhaled lipopolysaccharide (LPS) challenge (LPS is a bacterial cell wall fragment) and sputum induction (a procedure performed to help to cough up sputum (phlegm)) after a single subcutaneous dose of two dose levels.
Background: - Studies show that alcohol changes the amount of many brain chemicals. These changes may be related to continued drinking, craving for alcohol, and relapse. This study will use magnetic resonance imaging (MRI) to look at brain areas and brain chemistry during an infusion of alcohol. It will also study how changes in brain chemistry relate to participant reports of feeling drunk. Objectives: - To use magnetic resonance imaging to measure the effect of alcohol on brain chemistry Eligibility: - Individuals between 21 and 45 years of age. - Participants will be either light drinkers (1 to 14 standard alcoholic drinks per week) or heavy drinkers (20 to 40 standard alcoholic drinks per week). A standard drink is a 12-ounce beer, a 4-ounce glass of wine, or a shot of liquor. - Participants must be able to go without alcohol for at least 3 days in a row without severe withdrawal symptoms. Design: - This study requires two or three outpatient visits to the NIH Clinical Center. - Participants will have a physical exam and medical history. Blood and urine samples will be collected. Participants' alcohol drinking habits will also be assessed to determine whether they may have an alcohol use disorder. - At the first study visit, participants will have an infusion of alcohol. Blood samples will be collected to measure blood alcohol levels. - The MRI study visit will take place about 3 days after the first study visit. Participants will have an MRI scan of the brain, followed by an infusion of alcohol and another scan. Blood samples will be collected. - Participants will complete questionnaires before and after each infusion to measure their response to alcohol. - Heavy drinkers will come to the clinic for a third visit to discuss possible future treatment and any risky behavior associated with their high levels of alcohol use.
The purpose of this first-in-man Phase I study is to determine whether the CXCR4-inhibitor ALX-0651 is safe and effective after single or multiple intravenous administrations to healthy male volunteers.
Objective: To assess the cardiac effects of a an energy drink on blood pressure and heart rhythm in healthy subjects. Study design: Double blind, placebo controlled, cross-over Study population: Healthy human volunteers (active-duty) between age 18 to 40 years with no other medical conditions. Intervention: Energy drink or Placebo Primary outcome: Change in office systolic blood pressure
Background: - People with autism and autism spectrum disorders have problems with communication, behavior, and socializing, and many also have intellectual and developmental disabilities. The cause of autism is not known, but previous research has suggested an association between autism and immune changes in the brain. Researchers are interested in using the experimental radioactive drug (11C)PBR28, which attaches to a protein in the brain that is involved in immune changes, in positron emission tomography (PET) scanning of people with and without autism to see if there are greater immune changes in those with autism. Objectives: - To determine if positron emission tomography scanning can be used to evaluate changes in an immune system protein in the brains of people with autism. Eligibility: - Individuals between 18 and 45 years of age who have been diagnosed with either autism or autism spectrum disorders, or are healthy volunteers. Design: - Participants will be screened with a physical examination and psychological examination, medical history, questionnaires about behavior and mood, and blood and urine tests. - Participants will have two imaging studies of the brain at separate study visits. The first study visit will involve a magnetic resonance imaging (MRI) scan to provide a baseline image of the brain. The second study visit will involve PET scan with the radioactive chemical (11C)PBR28 to study immune system proteins in the brain. The MRI scan will take about 40 minutes, and the PET scan will take about 2 hours. - Participants will have a final study visit 24 hours after the PET scan to provide a final blood sample for testing.
In this study, we would like to explore the hypothesis that changes in metabolic state, induced by altering hormone levels and patterns of neural activity, affect the experience of anxiety in humans. We will also investigate if there is a link between high anxiety and higher caloric intake. Our aim is to characterize whether changes in current metabolic state systematically influence anxiety induced by a well established behavioral task known as the threat of shock. The neural regions activated by this behavioral task in healthy subjects have been well characterized. We have a priori regions of interest that include the insula, anterior cingulate cortex, hypothalamus, amygdala, and prefrontal cortex. As our primary outcome, we will assess neural activation with whole-brain functional magnetic resonance imaging to determine whether brain regions are differentially engaged when subjects experience anxiety across different metabolic states. We will correlate these changes with psychophysiological measures of anxiety and metabolic state.
Hepatitis B Virus Antibody Booster Program
The primary objective of this study evaluates the safety and tolerability of multiple, escalating doses of PF-04958242 administered orally to healthy adult participants.This study also evaluates the plasma and urine multiple dose pharmacokinetics (PK) of PF-04958242.