available over the counter: no

uses: long term treatment of constipation

mechanism of action: draws water into the bowel;  loosens and softens stool; stimulates bowel activity

side effects
• common: diarrhea, intestinal cramps, increased thirst
• less common: none
• serious: weakness, confusion, muscle cramps

concerns: do not take for more than one week, unless your doctor advises; overuse may cause dependence