Hi PearlDoves,
I have TS & I do methyl b-12 shots every 3 days. I give them to myself. Obviously my shots must be different than yours since you do monthly shots. I use Dr. Neubrander's protocol and you can find more info about methyl b-12 shots on his website:
http://www.drneubrander.com/page2.html
He is a doctor that works mostly with children that have Autism & his big treatment for them is methyl b-12 shots. I do not have Autism, but find treatments to be similar. I have not found that the methyl-b12 shots increase my tics. I think you'll know if they increase yours after a few shots. The shots do increase my appetite.
Carolyn