<unk>  is usually prescribed after surgical removal of part or all of the stomach or intestine to ensure adequate serum levels of vitamin . It is also used to treat pernicious anemia, vitamin deficiency (due to low intake from food or inability to absorb due to genetic or other factors), thyrotoxicosis, hemorrhage, malignancy, liver disease and kidney disease.<unk>  injections are often prescribed to gastric bypass patients who have had part of their small intestine bypassed, making it difficult for to be acquired via food or vitamins.<unk>  is also used to perform the Schilling test to check ability to absorb vitamin .<unk>  is also produced in the body (and then excreted via urine) after intravenous hydroxycobalamin is used to treat cyanide poisoning.
Cyanocobalamin
Hydroxocobalamin
Sodium thiosulfate 
Dimethyl methylphosphonate
Acetylcysteine
Selenium disulfide
Disufenton sodium
Fomepizole