Whether you're having vitamin B12 injections, or supplements, speak to your doctor if you're experiencing side effects.
Those steps are part of the clinical training a provider delivers to a patient who has already been evaluated and prescribed a compound, not a public how-to for anyone with a search bar
In any case, the physician must do a complete diagnostic workup to track down the reason for elevated vitamin B12 levels
At CoLaz, B12 injections are given by trained clinicians after a written consultation, and we will tell you when a GP visit and blood test should come first
see Table 1) (EFSA NDA Panel (EFSA Panel on Dietetic Products, Nutrition and Allergies), 2015)
Some patients may also use treatment methods for when a headache occurs