
Safety and Efficacy of Sofosbuvir/Velpatasvir/Voxilaprevir and Sofosbuvir/Velpatasvir in Adults...
Hepatitis CThe primary objectives of this study are to compare the efficacy, safety, and tolerability of treatment with sofosbuvir/velpatasvir/voxilaprevir (SOF/VEL/VOX) fixed dose combination (FDC) for 8 weeks with that of SOF/VEL FDC for 12 weeks in direct-acting antiviral-naive participants with chronic hepatitis C virus (HCV) infection.

Sofosbuvir Containing Regimens for the Treatment of Chronic HCV GT2 Infected Patients
Chronic Hepatitis C InfectionThe purpose of this study is to assess the safety, tolerability, and efficacy of Sofosbuvir containing regimens in treatment-naive or treatment-experienced patients with HCV genotypes 2 infection.

Safety and Efficacy of SOF/VEL/VOX FDC for 8 Weeks and SOF/VEL for 12 Weeks in Adults Chronic Genotype...
Hepatitis C Virus InfectionThe primary objective of this study is to evaluate the efficacy, safety, and tolerability of treatment with sofosbuvir/velpatasvir/voxilaprevir (SOF/VEL/VOX) fixed-dose combination (FDC) for 8 weeks and of treatment with sofosbuvir/velpatasvir (SOF/VEL) FDC for 12 weeks in participants naive to direct-acting antivirals (DAA) with chronic genotype 3 hepatitis C virus (HCV) infection and cirrhosis.

Efficacy of High-dose Dual Therapy vs Bismuth-containing Quadruple Therapy for Rescue Treatment...
Helicobacter Pylori InfectionUp to now, there is few randomized, large scale study prospectively and simultaneously comparing the efficacy, adverse effects and patient adherence of high-dose dual therapy (HDDT) and bismuth-containing quadruple therapy (BQT) as rescue regimens for H. pylori eradication. The aims of this study are: to compare the efficacy of HDDT, and BQT as rescue regimen in H. pylori eradication; to compare the patient adherence and adverse effects of these treatment regimens; to investigate factors that may influence H. pylori eradication by these treatment regimens.

Mental Training for CFS Following EBV Infection in Adolescents
Fatigue SyndromeChronic1 moreThe general aim of this study is to investigate the effect of an individually tailored mental training program in adolescents developing chronic fatigue syndrome (CFS) after an acute Epstein Barr-virus (EBV) infection. Endpoints include physical activity (primary endpoint), symptoms (fatigue, pain, insomnia), cognitive function (executive functions) and markers of disease mechanisms (autonomic, endocrine, and immune responses).

Study of Ceftolozane/Tazobactam (MK-7625A) in Combination With Metronidazole in Japanese Participants...
Intra-abdominal InfectionComplicated Intra-abdominal InfectionThis is a Phase 3, multi-site, non-randomized, open-label study evaluating the safety and efficacy of MK-7625A 1.5 g (ceftolozane 1 g/tazobactam 0.5 g) plus metronidazole 500 mg for the treatment of Complicated Intra-abdominal Infections (cIAI) in Japanese participants. Efficacy will be primarily assessed by clinical response defined as complete resolution or significant improvement in signs and symptoms of the index infection.

Bioequivalence Study of a Fixed-dose Combination (FDC) of Dolutegravir (DTG) and Rilpivirine (RPV)...
InfectionHuman Immunodeficiency Virus1 moreThe purpose of the study is to evaluate the bioequivalence between Fixed-dose Combination (FDC) tablet formulation of Dolutegravir (DTG) 50 milligrams (mg) and Rilpivirine (RPV) 25 mg versus co-administration of the separate tablet formulations of DTG 50 mg plus RPV 25 mg, in the fed state. This pivotal bioequivalence study, is to serve as a pharmacokinetic (PK) bridge to the ongoing Phase 3 trials with the separate agents. This study will be conducted under fed conditions to appropriately mimic the conditions in the Phase 3 trials. This is a single-center, randomized, open-label, 2-period, single-dose, crossover study. A minimum of 86 healthy adult subjects will be randomized such that a minimum of approximately 82 evaluable subjects complete the study. The total duration of participation of a subject in this study will be approximately 8 weeks which includes a screening visit within 30 days prior to the first dose of study drug, two treatment periods each with a single dose of study drug and a follow-up visit within 12-17 days after the last dose of study drug. There will be a washout of at least 21 days between each dose of study drug. A blinded (for treatment) review of DTG and RPV plasma concentration data for approximately the first 40 subjects will be conducted. If the within-subject coefficients of variation (CVw%) for either DTG or RPV maximal drug concentration (Cmax) values are >=31%; a sample size re-estimation will be employed and additional subjects (beyond the 86 planned) will be randomized for treatment in the study. Following the re-estimation, it is possible that up to approximately 154 healthy adult subjects (68 new subjects in addition to the planned 86 subjects above) will be randomized such that a maximum of approximately 146 evaluable subjects could complete the study.

Fecal Microbiota Transplantation for Relapsing Clostridium Difficile Infection
Clostridium Difficile InfectionRandomized open label clinical trial to compare the clinical and microbiological efficacy of fecal microbiota transplantation, fidaxomicin, and vancomycin for relapsing Clostridium difficile infection

Study of Efficacy and Safety of Grazoprevir (MK-5172) + Elbasvir (MK-8742) With or Without Ribavirin...
Hepatitis C InfectionThis is an efficacy and safety study of grazoprevir (MK-5172) in combination with elbasvir (MK-8742) with or without ribavirin (RBV) in participants with chronic hepatitis C virus (HCV) genotype (GT) 1, 4, or 6 infections who have failed prior therapy with pegylated interferon and RBV. The primary study hypothesis is that in at least one of the study arms, the percentage of participants achieving sustained viral response 12 weeks after the end of all study treatment (SVR12) will be superior to 58%.

Piperacillin Sodium and Sulbactam Sodium for Injection(2:1) for Treatment of Respiratory and Urinary...
Respiratory Tract InfectionsUrinary Tract InfectionsIn the proposed study, the investigators plan to evaluate the efficacy and safety of Piperacillin Sodium and Sulbactam Sodium for Injection(2:1) for the treatment of respiratory and urinary tract acute bacterial infection.