What side effects may I notice from receiving Famotidine, Calcium, Magnesium Hydroxide?

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 face, lips or tongue)
-heartbeat rhythm changes (trouble breathing; chest pain; dizziness; fast, irregular heartbeat; feeling faint or lightheaded, falls)
-kidney stones (blood in the urine; pain when urinating; pain the lower back or side)
-low vitamin B levels (trouble breathing; feeling faint or lightheaded, falls; fast, irregular heartbeat; muscle weakness; pale skin; changes in emotions or mood; and pain, tingling, or numbness in the hands or feet)
Side effects that usually do not require medical attention (report these to your doctor or health care professional if they continue or are bothersome):

-constipation
-dizziness
-headache
-nausea, vomiting

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