Fentanyl
"My Pain is completely alleviated with this medication when in normal use.  I am on a 3 day schedule in changing the patches.  I did try to go on a 2 day schedule as well, but then I experience too many unwanted side effects (drowsiness, feeling 'high', etc) so I asked to go back to 3 days.  After about 2 and 1/4 days the patch doesn't seem to work, so the final 3/4 day I really start to feel the pain and withdrawal symptoms.  

I sometimes feel the loss of 'control' with the patch because of the time it takes for it to become effective and the amount of time it goes out of your system.  In other words, if a patch rips (I've had 2 do so in the last year) I start to feel the medicine pouring into my system and I have to immediately take off the patch."