"my husband has stage iv tongue cancer. he was put on fentanyl patches starting at 25 mcg &amp; was raised to 150 mcg q 72 hrs. what determines 48 hours or 72 hours the ins.? how do they know what relieves a persons pain especially one with cancer! it has been terrible watching him in such pain because the ins. won&#039;t cover the patches when necessary with the drs. approval due to increase until pain relieving amount was reached! any ideas what i can do??"