Hydroxocobalamin is a form of vitamin B12 that is used to treat vitamin B12 deficiency and other medical conditions that may cause low levels of vitamin B12 in the body. It works by converting to an active form of vitamin B12, which is essential for various bodily functions, including the production of red blood cells, DNA synthesis, and nerve function. Hydroxocobalamin is typically administered via injection and is usually prescribed by a doctor. It is important to follow the instructions provided by a healthcare provider or pharmacist and to use the medication only as directed. Hydroxocobalamin may have potential side effects and risks, which should be discussed with a doctor before taking the medication.