b12 injection once a week How Often Can I Take Injections? Vitamin B12 Dosages: Your GoodRx

This drug can be used in both humans and other animal species that have a specific indication for its use as recommended by their doctor or veterinarian

Because of this, the medication stays in the bloodstream for a long time, meaning people only need to take it once a week for it to work

This is the schedule for cobalamin injections and monitoring that the Gastrointestinal Laboratory at Texas A&M University currently recommends: Every 7 days for 6 weeks, then one dose after 30 days, and retesting 30 days after the last dose

Pharmacy delay is a few days

Had sort of assumed it was to do with risks of cross contamination but thinking about how others have described the process of doing an intra-muscular injection I think different sized needs are used to draw the fluid in to the syringe - probably a wider one - and then a finer one to inject