how long does a vitamin b12 injection take to work B-12 Benefits | Uses | Side Effects How Quickly Does a B12

My thyroid is fluctuating between too much hormone and too little so i have to excercise to regulate it

Vitamin b1, b6 and b12 injection ampoules- Picture Courtesy: ethicaldrugs.net Vitamin b1, b6, and b12 are collectively known as neurotropic vitamins

The injection is given intravenously or intramuscularly as per the doctors advice

Always use a new, sterile syringe for this process and follow the specific instructions provided by your pharmacy, as volumes may vary

Place the prefilled syringe into the Self-Injector

Learn where to self-administer a B12 shot and how to do it painlessly This article was medically reviewed by Shari Forschen, NP, MA and by wikiHow staff writer, Amber Crain