over the counter injectable b12 Nature Made Vitamin Sublingual 1000 mcg Sugar Free Fast Dissolve Tablets, 60 Count or subcutaneously Vitamin B-12 3,000 mcg Gummy,
Description
For example, if you injected medication into your left thigh this morning, use your right thigh this afternoon, your left abdomen tomorrow morning, and your right abdomen tomorrow afternoon

About vitamin B12 Vitamin B12 is a nutrient that promotes the health of your nerves and blood cells, making it an essential part of any healthy diet

In fact, there is no indication to use vitamin B12 shots at all when you are not currently deficient in vitamin B12

So if you have any of the below symptoms, you most likely need B12
