I was also given the Catapress Patches in rehab but, like windy, was kinda' out of my mind at the time and don't recall what strength they were...sorry!
They put one on each of my back shoulder blades and I wore them the 4-days in rehab and for another 10-days afterward when I came home.
I noticed they did make me alittle sluggish and tired so I took one off first, noticed an improvement, so took the other off the following day.
I think they really helped me during the first week or so to not have so bad of WDs and especially the "crazy legs".
JMO, but probably best to go with the patches...You can't screw it up or take more than needed and much easier to get rid of {just take them off} if you do.
Best of luck!
Jane