Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using dicyclomine and call your doctor at once if you have a serious side effect such as:
severe constipation, bloating, or stomach pain;
worsening of diarrhea or other irritable bowel symptoms;
feeling very thirsty or hot, being unable to urinate, heavy sweating, or hot and dry skin
confusion, hallucinations, unusual thoughts or behavior; or
pounding heartbeats or fluttering in your chest.
Less serious side effects may include:
drowsiness, dizziness, weakness, nervousness;
blurred vision;
dry mouth, stuffy nose; or
mild constipation.
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.
 Dicyclomine side effects (more detail)
