For really bad cases, you might need more, and shots are given once a week, or as the doctor says
What age should I start Botox
Given the safety, relative low cost, and significant affect cobalamin deficiency can have on quality of life, we recommend B12 supplementation for all emaciated patients, regardless of whether access to serum cobalamin testing is available
The compound can be used by women, though effects specific to female physiology have not been specifically studied
Effect of B-vitamin therapy on progression of diabetic nephropathy
For intramuscular or subcutaneous injection: use 5-40 mg of active ingredient at a time, 1-2 times a day intramuscularly or subcutaneously