You should not receive this medicine if you have had an allergic reaction to ferumoxytol or to any iron-containing products, if you have a condition called iron overload, or any type of anemia that is not caused by iron deficiency.
Make sure your doctor knows if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, or low blood pressure. Tell you doctor if you are on kidney dialysis.
This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you have a rash; itching; hoarseness; trouble breathing; trouble swallowing; or any swelling of your hands, face, or mouth after you receive this medicine.
Dizziness, lightheadedness, or fainting may occur, especially when you get up from a lying or sitting position suddenly. These symptoms are more likely to occur when you begin using this medicine, or when the dose is increased.
Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may affect the results of certain medical tests.
Your doctor will need to check your blood at regular visits while you are using this medicine. Be sure to keep all appointments.