This is not a complete list of side effects and others may occur. Pain, swelling, or irritation of your skin where the injection was given. Red coloring of your urine (may last 2 to 5 weeks) or Severe shortness of breath, wheezing, gasping for breath, cough with foamy mucus Ī light-headed feeling, like you might pass out orĭangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, shortness of breath, uneven heartbeats, seizure).Ĭommon side effects of Hydroxocobalamin may include: Call your doctor if you have a rash that lasts longer than 4 weeks.Ĭall your doctor at once if you have a serious side effect such as: This rash should go away without treatment. You may develop an acne-like skin rash within 1 to 4 weeks after you are treated with hydroxocobalamin. Get emergency medical help if you have any of these signs of an allergic reaction: hives chest tightness, difficulty breathing swelling of your face, lips, tongue, or throat. Make sure any doctor caring for your pregnancy or your baby knows you have received this medication. In an emergency situation, it may not be possible before you are treated with hydroxocobalamin to tell your caregivers if you are pregnant or breast feeding. You should not breast-feed after you have been treated with hydroxocobalamin. It is not known whether hydroxocobalamin passes into breast milk or if it could harm a nursing baby. However, the benefits of treating cyanide poisoning may outweigh any risks posed by hydroxocobalamin, for both you and your baby.

It is not known whether hydroxocobalamin will harm an unborn baby. If you have ever had a severe allergic reaction to hydroxocobalamin, Vitamin B12, or cyanocobalamin ( Nascobal, Cobolin, Cyomin, and others).įDA pregnancy category C.

Kidney disease (or if you are on dialysis) or If possible before you receive hydroxocobalamin, tell your caregivers if you have:

Cyanide treatment kit