Psyllium

Psyllium is a hydrophilic colloid and bulk-forming agent that enhances the retention of intraluminal fluid. It resists enzymatic digestion and reaches the colon largely unchanged, where it is fermented by colonic bacteria. This action increases stool water content and propulsive contractions in the colon, while decreasing overall transit time, leading to softened and bulkier feces.

Adult

treat fecal impaction in young children and debilitated adults. It is not palatable but may be mixed with juices. Aspiration can result in a severe lipid pneumonitis. Long­term use can impair absorption of fat­soluble vitamins (A, D, E, K). OSMOTIC LAXATIVES The colon can neither concentrate nor dilute fecal fluid: fecal water is isotonic throughout the colon.…