When a patient takes the anticancer medicine methotrexate or has an overdose of it, the doctor prescribes them the Biovorin Injection. As it should be given into the veins of the patient properly and carefully, a professional doctor or medical person can only be injected. Every important detail like dosage and duration of the injection will be decided by the doctor and you must take it exactly as the advice. The whole instructions depend on what you are being treated for and change from time to time and important that you pay attention to your doctor’s instructions every time you go for the check-up.