What special precautions should I follow?
Before taking Cyanocobalamin:
Tell your doctor if you have Leber's disease. Cyanocobalamin may lead to optic nerve damage and possibly blindness when used by people with this condition.
Furthermore, inform your doctor if you are taking any of the following medications: antibiotics, methotrexate (Rheumatrex®), or pyrimethamine (Daraprim®). These medicines may interfere with diagnostic tests for vitamin B12 and folic acid. So too, colchicine or heavy alcohol consumption over 2 weeks or longer can cause decreased cyanocobalamin absorption.
Do not use any other nasal medications while using cyanocobalamin nasal unless they are approved by your doctor.
Additionally, drugs other than those listed here may also interact with cyanocobalamin. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.
If you are using the nasal spray, tell your doctor if you develop nasal congestion, a cold, or allergies. The nasal spray may not work as well if you are congested.
Cyanocobalamin is in the FDA pregnancy category C. This means that it is not known whether it will harm an unborn baby. Vitamin B12 is important to the proper development of a baby. Talk to your doctor about this medication if you are pregnant.
Moreover, cyanocobalamin passes into breast milk. Vitamin B12 is necessary for both mother and child during breast-feeding. Talk to your doctor about taking this medication during breast-feeding.
Why is this medication prescribed?
Dosage and using this medicine
What should I do if I forget a dose?
What side effects can this medication cause?