Imodium (Loperamide): Side Effects, Risks & Mild Dizziness

Imodium is a brand name for the drug loperamide, an over-the-counter medication used to treat diarrhea. Imodium also can reduce the amount of stool produced in people who have undergone an ileostomy. Some side effects are possible, but most are mild.

Common Side Effects

• The most common side effects associated with Imodium are mild dizziness, drowsiness, dry mouth, mild stomach pain and tiredness. In relieving diarrhea, the medication also can cause constipation.

Serious Side Effects

• Serious but rare Imodium side effects call for immediate medical attention. These include severe stomach pain, worsening diarrhea and vomiting.

Skin Disorder

• Other serious reactions that need medical attention include symptoms of fever, sore throat, headache and a severe rash with blistering and peeling.

Allergic Reaction

• Rarely, some people have an allergic reaction to Imodium. Signs include difficulty breathing, rash and itching, hives, swelling and severe dizziness.

Contraindications

• People should not take Imodium if they are allergic to loperamide, are taking an antibiotic that may be causing diarrhea, or are experiencing bloody or tarry stools.