can b12 injection cause headaches I've had a migraine since Sept 4th. I took a that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one Vitamin B12 shots: Uses, benefits,
Description
Always talk to a healthcare provider about your specific situation
They will evaluate your medical history and weight loss goals
The enzyme responsible for degrading excess norepinephrine and adrenaline is called COMT (catechol-O-methyltransferase)

I have to have eye drops without preservatives, so I am hoping that mine will be ok (the b12)..I have been on Vit D two days and I amitching a bit too

Cyanocobalamin (Vitamin B12) A stable, trusted form of B12 that the body easily converts to its active form