A health care provider should determine when a patient needs a laxative and which form is best. Laxatives taken by mouth are available in liquid, tablet, gum, powder, and granule forms. Bulk-forming laxatives generally are considered the safest but can interfere with absorption of some medicines. These laxatives, also known as fiber supplements, are taken with water. They absorb water in the intestine and make the stool softer.
Stimulants cause rhythmic muscle contractions in the intestines.
Most laxative makers have replaced or plan to replace phenolphthalein with a safer ingredient. Stool softeners provide moisture to the stool and prevent dehydration. These laxatives are often recommended after child birth or surgery. Lubricants grease the stool enabling it to move through the intestine more easily. Mineral oil is the most common lubricant.