Since my levels have dropped again in spite of monthly injections, I'm thinking of adding a fast disolving under the tongue tab of b12. Has anyone had any experience / luck with these? Other wise I'm going to insist on weekly/biweekly injections until levels are back up to a normal level. Currently they have dropped to 278 and need to be 400+. I suspected as much since I've been getting a numb toe off and on and short of breath when I shouldn't be. This tired all the time stuff is crap, I could see if I was flaring but I'm not.