What side effects may I notice from receiving Calcium?

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
-confusion or irritability
-headache
-loss of appetite
-nausea, vomiting
-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
-stomach gas

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