What side effects may I notice from receiving Hydroxocobalamin?

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
-breathing problems
-chest tightness, pain
-dizziness
-shaking or shivering

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-diarrhea
-headache
-nausea, vomiting
-pain at site where injected
-red colored urine
-red tint to skin

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