Laxatives and constipation. 'Regular' may not be as often as you think.
D002400:Cathartics / Q000145:classification / Q000627:therapeutic use*; D003248:Constipation / Q000209:etiology / Q000628:therapy*; D003672:Defecation / Q000502:physiology; D006801:Humans; D010507:Periodicity
D002400:Cathartics