symptoms worse after b12 injections Why do I feel a injection? How long do B12 injections

Educational leadership since 2012 A founder-led team collaborating with clinicians, researchers, and health writers to make complex science accessible and actionable

Had my last loading jab yesterday and feeling terrible

With the needle still in, turn the vial upside down and pull the plunger back to fill the syringe with your B12 dose

Vitamin B12 injection effects can include: Soreness or slight bruising where the needle goes in A warm feeling right after the injection Mild headache in some people, which usually passes quickly Rare allergic reactions, which is why a health check happens first Vitamin B12 injection painful is a common worry, but most people describe it as a quick pinch rather than anything severe