Which is best? Miralax (polyethylene glycol) or ducolax stool softener. Constipated. May have diverticulitis. Will have CT friday. Took miralax (polyethylene glycol) 2 days then ducolax last nite

Different mechanisms. They have different mechanisms of action. Miralax (polyethylene glycol) is an osmotic laxative (draws water out). Dulcolax is a stimulating laxative and for best effect take tablet with full glass water on empty stomach. Severe ab pain or fever then urgently see a doctor. You may benefit from an online consultation to best determine symptomatic care for constipation and advise next steps.