Irritable Bowel Syndrome - Diarrhoea

The goal of this clinical trial is to assess and compare the effect of ebastine and placebo in improving symptoms in patients with diarrhea predominant IBS. It will also assess about the safety of drugs ebastine and placebo by recording the patient reported adverse events. The main questions it aim to answer are: Does drug ebastine and placebo has any effect on patients with IBS-D? What medical problems do participants have when taking drug ebastine and placebo? Researcher will compare effect of drug ebastine and placebo . Participant will: Take drug ebastine 20 mg at night and placebo once daily at night every day for 8 weeks along with lifestyle modifications. After that all two groups will visit the hospital 4 weekly, and their symptoms will be assessed by IBS symptom severity score (IBS-SSS) at baseline, week 4 and week 8. Additionally, patient reported adverse events will be documented.

Irritable bowel syndrome with diarrhea (IBS-D) is a functional gastrointestinal disorder, with characteristics of defecation related abdominal pain and diarrhea. Routine treatment strategy for IBS-D is symptom-based with unsatisfactory results, while there is a growing interest in complementary and alternative medicine such as Traditional Chinese Medicine. However, lack of high-quality evidences being the obstacle for its development. This study aims to evaluate the efficacy of Fengliao Changweikang Keli (FLCWK) on symptoms and health-related quality of life in mild to moderate IBS-D patients. After 2-week run-in period, each participant will be randomized to a sequence of six 4-week double-blind treatment periods of FLCWK 8 g three times daily or placebo, separated by 2-week washout periods.

The goal of this clinical trial is to learn if Bifidobacterium. animalis subsp. Lactis A6 Strain or resveratrol to improve the symptoms of diarrhea-predominate irritable bowel syndromes (IBS-D). The main questions it aims to answer are: 1. Does Bifidobacterium animalis subsp.Lactis A6 Strain or resveratrol improve the symptoms of IBS-D. 2. What is the optimal intervention dose of Bifidobacterium. animalis subsp.Lactis A6 Strain or resveratrol to improve IBS-D Researchers will compare Bifidobacterium. animalis subsp.Lactis A6 Strain or resveratrol interventions to placebo (one look-alike sunbstance that contains no interventions substance) to see if Bifidobacterium. animalis subsp.Lactis A6 Strain or resveratrol relief the symptoms of patients with IBS-D. Participants will: 1. Take Bifidobacterium. animalis subsp.Lactis A6 Strain or resveratrol every day for 30 days. 2. Visit the clinic once every 15 days for checkups and tests.