Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Some side effects may occur up to 30 hours after you take this medicine.
Stop using this medicine and call your doctor at once if you have:
severe constipation, stomach pain or bloating;
ongoing or worsening diarrhea;
diarrhea that is watery or bloody;
severe pain in your upper stomach spreading to your back;
fever, flushing (warmth, redness, or tingly feeling);
hallucinations, seizure;
rapid breathing, weak or shallow breathing;
fast heart rate; or
dehydration symptoms--feeling very thirsty or hot, being unable to urinate, heavy sweating, or hot and dry skin.
Common side effects may include:
drowsiness, dizziness, feeling restless;
headache;
numbness in your hands or feet;
depression, not feeling well;
confusion, feelings of extreme happiness;
red or swollen gums;
dry mouth, nose, or throat;
nausea, vomiting, upset stomach, loss of appetite; or
skin rash, dryness, or itching.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Lomotil side effects (more detail)
