What side effects may I notice from receiving Dimenhydrinate?

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
-changes in vision
-confused, agitated, or nervous
-fast, irregular heartbeat
-feeling faint or lightheaded, falls
-ringing in the ears
-tremor
-trouble passing urine or change in the amount of urine
-unusual bleeding or bruising
-unusually weak or tired

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-constipation or diarrhea
-dry mouth
-headache
-loss of appetite
-stomach upset, vomiting

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