Anyone else get a "wired but tired" feeling from taking B12? I haven't been taking much....not more than 250 mcg/day....but boy the wired feeling has hit me! And it seems the last time I had this (the wired feeling) was when I also tried B12! It definitely causes cystic acne in me too. Anyway, just wondering if other experience this. What is the reason that this occurs (if there is a relationship). I need to take B12 as my levels are getting low (317) and I think I'm beginning to have some deficiency symptoms. But I sure don't like this wired feeling! Thanks for sharing your experiences!