Active clinical trials for "Gastroesophageal Reflux"

The objectives of this study are to examine the effects of ethnicity, gender, and proton pump inhibitor (PPI, omeprazole), on the human gut microbiome. The investigators hypothesize that PPI therapy might perturb microbial communities and alter the gut microbiome. Young, healthy subjects of Chinese, Malay and Indian ancestry, were enrolled. They were required to provide a baseline stool sample (Day 1) and were then given a course of omeprazole at therapeutic dose (20 mg daily) for a duration of 7 days. Stool samples were collected again on Day 7 and Day 14 (one week after stopping omeprazole). The DNA samples were subjected to 16S ribosomal ribonucleic acid (rRNA) sequencing.

The aim of this study is to compare subjective and objective outcome and surgical "side effects" of Nissen and Toupet fundoplication performed in a single institution by only two surgeons and to compare pre and postoperative findings to healthy individuals.

The purpose of the study is to evaluate and compare the pharmacokinetics (blood levels) of 2 different formulations, assess the effect of food on the pharmacokinetics and assess safety of rabeprazole sodium in healthy volunteers. Rabeprazole sodium is a drug used to treat patients with Gastro Esophageal Reflux Disease (GERD). GERD is a condition in which the esophagus (tube from throat to stomach) becomes irritated or inflamed because of acid backing up from the stomach.

The implications of sleep as it relates to the physiology and pathogenesis of a number of diseases has until recently been ignored. With the evolution of sleep laboratories, there is an emerging recognition of the relationship between sleep and various gastrointestinal diseases- in particular gastroesophageal reflux disease (GERD).( 1-5) It seems intuitive that waking/daytime activities or events may affect sleep and that any consequent sleep dysfunction may reciprocally further affect daytime function

The aim is to establish the maximal tolerated dose of AZD3355 for the selection of doses in the up-coming studies. This will be done by comparing single and repeated doses of AZD3355 to placebo ("inactive substance"). Safety and tolerability variables will be closely monitored throughout the study.

The prevalence of GERD is estimated to be as high as 20% in the US, and up to 50% remain symptomatic on proton pump inhibitor (PPI) therapy. The clinical approach to understand the mechanism of nonresponse is not standardized, and patients will often undergo various tests: 1) pH-impedance, 2) wireless pH monitoring over 96 hours, 3) high-resolution impedance manometry (HRIM), and 4) mucosal impedance (MI). Controversy exists regarding the best technique, optimal study protocol and treatment approach for the PPI non-responder (PPINR) group, resulting in inappropriate resource utilization and a failure to provide effective personalized care. The first aim is to identify the relevant physiologic parameters of diagnostic tools in their ability to predict PPI requirement. In Aim Two, these results will be applied to guide the formal development of a clinical algorithm for the management of PPINRs with personalized clinical pathways based on mechanism of treatment failure. We will first perform a prospective comparison trial of 240 PPINR subjects at 2 sites over 4 years. Subjects will complete symptom questionnaires and undergo diagnostic testing (pH-impedance on PPI therapy, HRIM, 96-hr wireless pH monitoring off PPI therapy and MI). Those who have a positive pH study and/or resume PPI therapy will receive escalation of therapy with dexlansoprazole. We will compare the ability of 96-hr wireless pH monitoring vs pH impedance to predict PPI requirement and response to dexlansoprazole, respectively. We will explore whether MI is equivalent to 96-hr wireless pH monitoring in predicting PPI requirement. Lastly, we will determine whether HRIM metrics can be utilized to determine reflux burden, mechanism and response to treatment. Next, the investigators will develop quality measures for reflux testing in order to develop a simplified management strategy for the PPINR group. The RAND/UCLA Appropriateness Methodology will be utilized with an expert working group to develop formal validated quality measures for reflux testing.

This study aims to determine, in obese subjects, the antisecretory effect of a single dose of placebo, rabeprazole 20 mg and omeprazole 20 mg using 24h gastric pH monitoring, in a prospective, monocentre, randomized manner. Monitorings are separated between 6 and10 days. The main outcome criteria of analysis is the percentage of time with gastric pH above 3 during 24hours.

The purpose of this study is to determine if pumosetrag is effective in treating Gastroesophageal Reflux Disease (GERD) symptoms in patients who have a history of GERD symptoms and are currently taking an acid suppression therapy, such as a Proton Pump Inhibitor (PPI).

The purpose of this study is to investigate the pharmacodynamic effect of AZD2516 in healthy male subjects.

The purpose of this study is to assess the pharmacokinetics and safety of dexlansoprazole, once daily (QD), in pediatric subjects with symptomatic Gastroesophageal Reflux Disease.