Warning:Loperamide may cause serious or life-threatening changes in your heart rhythm, especially in people who have taken more than the recommended amount. Tell your doctor if have or have ever had a prolonged QT interval (a rare heart problem that may cause irregular heartbeat, fainting, or sudden death), a slow or irregular heartbeat, or a low level of potassium in your blood.

Nonprescription (over-the-counter) loperamide is used to control acute diarrhea (loose stools that come on suddenly and usually lasts less than 2 weeks), including travelers' diarrhea. p>For more information on Imodium (loperamide), click here.