Heres what to expect when you come in for a B12 Injection , Well draw up your injection with you, clean and sterilize the injection site, communicate to make sure the injection is the most Feeling worse after B12 Injection: Answering concerns. La Vie Med Spa Vitamin B12 Injections Greenway and Cippenham in Slough For those taking injectable B12, how often is your level tested? : r B12_Deficiency