What side effects may I notice from receiving Methylene Blue?

Side effects that you should report to your doctor or health care professional as soon as possible:
-chest pain
-confusion
-dizziness
-headache
-increased sweating
-stomach pain

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
-blue-green coloration of urine and stools
-nausea, vomiting
-skin discoloration

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