At the end of my radiation treatments 6 1/2 weeks on, I started using Morphine like pain patches that you wear for 3 days at a time. This was because of a very sore palate and tongue. Please be careful of constipitation. It can happen very fast. I suffered a few nasty, "very painful" bouts of it before using stool softeners etc, to control it. The doctors warned me but I just didn't pay close enough attention.