Serotonin Effect in Functional Dyspepsia

Study Overview
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Brief Summary
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The purpose of this study is to investigate whether Efexor (venlafaxine) is effective in the treatment of functional dyspepsia.

Detailed Description
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BACKGROUND: A good 60% of patients presenting with upper abdominal complaints have functional dyspepsia. Usually, acid-suppressive drugs are given as first-line therapy for upper gastrointestinal symptoms. However, results are often not satisfying and symptoms persist. Since many patients with functional gastrointestinal diseases are more anxious and depressed in comparison to healthy controls, several studies investigated the use of antidepressant agents in these patients. Although many studies were underpowered, promising results were obtained with tricyclic antidepressant and mianserin in patients with irritable bowel syndrome. There is still a need for a placebo controlled study with antidepressants in patients with functional dyspepsia. OBJECTIVE: To investigate the effectiveness of venlafaxine, a selective serotonin and norepinephrine reuptake inhibitor, for treatment of patients with functional dyspepsia. STUDY DESIGN: A randomized, double blind, placebo controlled trial. STUDY POPULATION: Consecutive patients with persistent upper GI symptoms without abnormalities at upper gastrointestinal endoscopy. PRIMARY ENDPOINTS: Upper gastrointestinal symptom absence after 6 weeks treatment. SECONDARY ENDPOINTS: Anxiety and depression after venlafaxine treatment; Health related quality of life after venlafaxine treatment; The association between serotonin transporter protein and 5-HT receptor polymorphisms and efficacy of venlafaxine. STUDY PROCEDURE: A venous blood sample will be collected in a 10ml EDTA-tube. Then, each subject will be randomized to treatment with Efexor XR (first and last two weeks 75 mg 1dd and from the third to the fifth week 75 mg 2dd) or identical placebos for 8 weeks. Before starting and after finishing treatment, patients will be asked to fill out a questionnaire on intensity of their gastrointestinal complaints, current quality of life and anxiety and depression.

Official Title
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Serotonin Effect in Non-Ulcer Dyspepsia

Conditions
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Dyspepsia

Intervention / Treatment
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* Drug: venlafaxine


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Persistent upper gastrointestinal symptoms; Absence of any serious organic cause of the complaints at previous upper gastrointestinal endoscopy (including gastric ulcer, carcinoma, oesophageal reflux disease, portal hypertension, hernia hiatus >2 cm or severe gastritis); Over 18 years of age; Written informed consent. Exclusion Criteria: History of bipolar disorder; Contra-indication for venlafaxine; Current or planned pregnancy or lactation; Diagnosed alcoholism, anorexia nervosa or bulimia; Current or recent (within the last two weeks) use of a selective serotonin re-uptake inhibitor (SSRI) or MAO-inhibitor; Any other condition or circumstance that, in the opinion of the investigator or the physician, would compromise the subject's successful participation in this trial.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Intervention/Treatment |
| --- |
|Drug: venlafaxine|nan|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Upper gastrointestinal symptom absence after 6 weeks treatment. |  |  | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Anxiety and depression after venlafaxine treatment |  |  | 
| Health related quality of life after venlafaxine treatment |  |  | 
| The association between serotonin transporter protein and 5-HT receptor polymorphisms and efficacy of venlafaxine. |  |  | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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functional dyspepsia;, Serotonin Uptake Inhibitors;, Antidepressive Agents.