Many patients with tingling or numbness begin to notice a reduction over months two and three, with further recovery beyond six months
It is normally withdrawn, mixed with the drug, and then that mixture is injected (usually intramuscularly or subcutaneously, as indicated for the drug)
Vitamin B12 (cobalamin) supports red blood cell production, nerve function, and DNA synthesis
Nandipati KC, Subramanian S, Agrawal DK
Duration of use typically ranges from 4-8 weeks for acute conditions to 6-8 weeks or longer for chronic plantar fasciitis
Sorry I can't offer anything of much use and really hope that your GP is one of the 'good-ones' who will help in all the ways that GP's should