Psyllium Bookmark Share View List Oral PsylliumMetamucil Mechanism of ActionAbsorb water, resulting in increased faecal size and stimulation of peristalsis. Clinical UseIndicationPrevention of constipation.Adverse EffectsFlatulenceBorborygmus Want more info like this? MedSchool Your electronic clinical medicine handbook Guides to help pass your exams Tools every medical student needs Quick diagrams to have the answers, fast Quizzes to test your knowledge Explore