vaccine information sheet for cyanocobalamin b12 injectable Statements (VISs) Overview Vitamin B 12 Cyanocobalamin Injection
Description
You should expect to see full results from each session at about a month after injection, at which time you should come in for your next session until you have reached the desired level of correction

Of course, were always here to help you discover the best B12/MIC dose for you

Vitamin B12 Blood Test FAQs What does a high vitamin B12 indicate
As to the aches and pains, breathlessness etc, this could be due to B12 needing potassium to build RBC, so I would check out low potassium symptoms and eat a banana or maybe two until you have fathomed it out