Stimulant (Contact/Irritant): Senna, Bisacodyl, Castor oil. Direct stimu of enteric n. → ↑ peristalsis. & Irritate mucosa → ↑ water & electrolyte into lumen.
-- -- -- -- -- :check: Ac consti, bowel prep, :green_cross: abuse → atonic colon (“lazy bowel”), Melanosis coli (harmless pig, revers), cramp, dehyd