Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Rare
Bloating
constipation
loss of appetite
nausea
stomach pain
vomiting
Incidence not known
Blistering, peeling, loosening of skin
chest pain or discomfort
chills
cough
decrease in urine volume
decrease in frequency of urination
difficulty in passing urine
diarrhea
fainting
fast, pounding, or irregular heartbeat or pulse
hives or welts, itching, rash
irregular or slow heartbeat
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, sex organs
no blood pressure or pulse
painful urination
palpitations
red irritated eyes
redness of the skin
red skin lesions, often with a purple center
sores, ulcers, or white spots in the mouth or on the lips
sore throat
stopping of heart
unconsciousness
unusual tiredness or weakness
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Rare
Acid or sour stomach
belching
dizziness
drowsiness
dryness of mouth
excess air or gas in the stomach or bowels
full feeling
heartburn
indigestion
passing gas
stomach upset
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
 Imodium side effects (more detail)
