Hey, Sophie, I'm catching up here [have been nursing sick grandkids for a week]. #1. If the mucous is still a problem, get a suction machine- if you Doc won't prescribe one, I wil send you one to use until no longer needed. It will help!!. #2. If your hubby is not running a temp., rub his feet with a good lotion and have him wear socks, give him an electric blanket, put a t-shirt on or pjs and get him warm. You go sleep in another room ![ My John was cold all the time during treatment- summer and winter] We had an awful experience with fentanyl and quit it all together. What you all are going through now is a trial and error deal. His body will respond differently than someone's else's, but the side effects are pretty much the same- the problem is how to handle them on an individual basis. And as the caregiver, you ae going to be at your wits end Hang in there, Sophie, this is not easy. And please let me know if you want the "traveling suction machine". Amy in the Ozarks