What side effects may I notice from receiving Verapamil?

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

-allergic reactions (skin rash, itching or hives; swelling of the face, lips, or tongue)
-heart failure (trouble breathing; fast, irregular heartbeat; sudden weight gain; swelling of the ankles, feet, hands; unusually weak or tired)
-heartbeat rhythm changes (trouble breathing; chest pain; dizziness; fast, irregular heartbeat; feeling faint or lightheaded, falls)
-low blood pressure (dizziness; feeling faint or lightheaded, falls; 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
-facial flushing
-headache
-nausea
-stomach pain
-unusual swelling

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