Hi Margaret
The RO told me that it is a 50/50 shot as to whether it works or not. I had it for 6 of my 7 weeks of IMRT treatment, and I am now battling the dry mouth, so I can not imagine if I had not had the shots.
The worst side effect I had at first was the headache's. Then we had to stop it at 6 weeks due to the intense nausea.
I'd ask again!
Kevin