If you are currently using sublingual or oral forms of B12 and you are getting symptomatic relief then I wouldnt recommend changing up your method of administration
A list of common conditions besides pernicious anemia associated with a B12 deficiency includes the following: Crohns disease Celiac disease Atrophic gastritis, otherwise known as a thinning of the stomach lining Bacteria or parasites in the intestines Immune system disorders, including Graves disease and lupus Inflammatory bowel disease (IBD) Medications Medications can also interfere with B12 absorption, such as some heartburn medicines and proton pump inhibitors prescribed to diabetics
The exact dosage and frequency can vary based on the individuals condition, the severity of deficiency, and specific medical advice
The authors also noted that further optimisation was needed, including work relating to high clearance in mice and off-target activity against monoamine oxidase A
For severe cases, the first dose is usually 1,000 mcg given intramuscularly every day or every other day for a week or two