Bulk-forming laxatives
psyllium seed (eg, Metamucil) methylcellulose (eg, Citrucel) calcium polycarbophil (eg, FiberCon)
Osmotic agents:
Polyethylene glycol (PEG) Synthetic disaccharides – Lactulose
Stimulant laxatives: fastest-acting
bisacodyl (eg, some forms of Dulcolax)
senna (eg, Senokot),
Surfactants laxatives: fastest-acting
docusate sodium (eg, Dulcolax)