What side effects may I notice from receiving Diltiazem?

Side effects that you should report to your doctor or health care provider 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)
-liver injury (dark yellow or brown urine; general ill feeling or flu-like symptoms; loss of appetite, right upper belly pain; unusually weak or tired, yellowing of the eyes or skin)
-redness, blistering, peeling, or loosening of the skin, including inside the mouth
Side effects that usually do not require medical attention (report to your doctor or health care provider if they continue or are bothersome):

-changes in sex drive or performance
-changes in vision
-cough
-depressed mood
-headache
-nasal congestion (like runny or stuffy nose)
-sudden weight gain
-trouble sleeping

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