What side effects may I notice from receiving Antivert?

Side effects that you should report to your doctor or health care professional as soon as possible:

-feeling faint or lightheaded, falls
-fast, irregular heartbeat

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
-trouble passing urine or change in the amount of urine
-trouble sleeping
-upset stomach

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