Thread: Overdose of vitamin B12?

I started taking B12 today. I took two pills accidentally. They are 2500mcg. sublingual tablets. I haven't taken it before and have mild tingling. I know it's suppposed to be water soluable but I've also read that you can take too much. Should I be worried?

Yes, an overdose is around 3000 mcg, and the side-effects do include tingling, numbness; even slight headache. There isn't much more that you can do than dilute the B-12 by drinking water, althouogh that may not even be very affective. The effects should wear off in a day or two.