Hi Alan,
I too used to experience this quite a bit - especially in the cold winters of Nova Scotia. It doesn't seem so bad now in Scotland. It's almost a numbness that prevents movement to me ( I know everyone explains it differently). It also affects me when typing for long periods of time (writing papers in university was a killer), knitting, cross-stitch and once or twice (when I was at my worst) writing on the chalk board at school. Most recently I experienced it when I was trying archery - it was a bitterly cold, rainy Scottish day and I had to keep my hands out to hold the bow. By the time my lesson was done I couldn't hold ANYTHING. I went in for a hot cup of tea and just about dropped it. Not one of my more obvious symptoms but there nonetheless. I guess it probably has something to do with the fine motor muscles in my fingers and hands?!? Hope you get your meds sorted soon - it must be very frustrating for you!
~Kathy