well I know the NOS drinks really helped me going through wd's. I never got into them before........ I drink coffee too,on top of it, in the morning then the NOS durring the afternoons. so that was a boatload of caffine. but at that time, man I was going through some major 'done wd's, so anything at all to help......
but after two months or longer, I felt I was addicted to them. I was feeling much better, and just stopped going to the store where I got them.