available over the counter: yes

uses: to relieve short term constipation

mechanism of action: increases volume of fluid in the intestines to promote passage of stool

side effects
• common: abdominal cramping, diarrhea
• less common: nausea, vomiting, muscle weakness, rectal pain, bleeding, burning, itching
• serious: severe abdominal pain

concerns: do not take for more than one week, unless your doctor advises; excessive use may cause loss of body fluid