I have no side effects at all it is a supplement your body requires. I get a bit more energetic but pretty much normal. I used to do my Humira shots myself but that was from my Gi and my Gp will not let me do my own needles, I have to buy the b12 vile (insurance pays for it) but a bottle last a year. Oh well going to the docs once a month gets me out, and it is safe. I could have a nurse do it but then I would have to pay for the nurse come here. I know weird. I have a Jetta Diesel and cheap no gas, and this way there wont be no complications, and I keep a tab on my blood work.
I am not a afraid of needles, never have. Some people don't. :eek2: