If you are in serious pain and can't wait hours for
it to kick in you can put a heat
ing pad on the fentanyl patch, the <span style = 'background-color: #dae8f4'>heat</span>
releases the fentanyl from the patch alot quicker, there <span style = 'background-color: #dae8f4'>for</span>
reducing the waiting period substantialy. Also..normally you will change the patch every 72 hrs, but at the end of 48 hrs you can put another patch on, and remove the old patch as directed, usually after 72 hrs. This will keep a continous level of fentanyl in your system, and according to my experience and my Dr.