Side Effects of Imodium

Imodium slows the rhythm of digestion so that the small intestines have more time to absorb fluid and nutrients from the foods you eat.

Imodium is used to treat diarrhea. Imodium is also used to reduce the amount of stool in people who have an ileostomy (re-routing of the bowel through a surgical opening in the stomach).
Do not use Imodium if you are allergic to loperamide, or if you have:

  • stools that are bloody, black, or tarry; or
  • if you have diarrhea that is caused by taking an antibiotic.

Ask a doctor or pharmacist if it is safe for you to take Imodium if you have:

  • a fever;
  • mucus in your stools;
    a history of liver disease; or
  • if you are taking an antibiotic.

FDA pregnancy category C. It is not known whether Imodium will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication. Loperamide can pass into breast milk and may harm a nursing baby. You should not breast-feed while you are using Imodium. Do not give this medicine to a child without medical advice.

Get emergency medical help if you have any of these signs of an allergic reaction to Imodium: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using this medication and call your doctor at once if you have any of these serious side effects:

  • stomach pain or bloating;
  • ongoing or worsening diarrhea;
  • diarrhea that is watery or bloody; or
  • severe skin reaction – fever, sore throat, swelling in your face or tongue, burning in your eyes, skin pain, followed by a red or purple skin rash that spreads (especially in the face or upper body) and causes blistering and peeling.

Less serious Imodium side effects may include:

  • dizziness;
  • drowsiness, tired feeling;
  • constipation;
  • mild stomach pain; or
  • mild skin rash or itching.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

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