Imodium may take up to 48 hours to cause symptoms to improve, states Drugs.com. If the medication does not work after 10 days, contact a doctor. Take Imodium directly as the label instructs. Do not exceed three doses within 24 hours, unless otherwise directed by a doctor.
Drink a full cup of water with Imodium to prevent dehydration. Forms of Imodium include Imodium A-D, Imodium A-D EZ Chews, Imodium Multi-Symptom Relief and Imodium A-D for children, notes the official website. People who are allergic to loperamide should not take Imodium. People who have fever, bloody or black stools, or mucus in the stool should not take Imodium, nor should people taking antibiotics, warns Drugs.com.