What side effects may I notice from receiving Bentyl?

Side effects that you should report to your doctor or health care professional as soon as possible:
-allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
-agitation, nervousness, confusion
-difficulty swallowing
-dizziness, drowsiness
-fast or slow heartbeat
-hallucinations (seeing or hearing things that are not really there)
-pain or difficulty passing urine

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-constipation
-headache
-nausea or vomiting
-sexual difficulty (impotence)

This list may not describe all possible side effects for Bentyl. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.