What are precautions for cyanocobalamin (Vitamin B12)?


There are several precautions you should be aware of before you begin taking cyanocobalamin (vitamin B12) injection, nasal gel (Nascobal) or tablets. These include:

  • Talk to your doctor if you think you are allergic to cyanocobalamin, any other vitamins or cobalt.
  • Make sure you tell your doctor and pharmacist every nonprescription substance you are taking, including vitamins, aspirin or any dietary supplements, including any prescription drugs you are taking.
  • Make sure you tell your doctor if you are taking the following drugs that may interact: antibiotics such as chloramphenicol, colchicine, folic acid (folate), methotrexate (Rheumatrex, Trexall), para-aminosalicylic acid (Paser) or pyrimethamine (Daraprim).
  • Make sure you tell your doctor if you drink alcohol, if you have had Leber's hereditary optic neuropathy or kidney problems.
  • Make sure you tell your doctor about your plans to get pregnant, if you are currently pregnant or if you are breastfeeding. Cyanocobalamin might cause harm to a developing baby.