Sorry to hear about your spasms, had them, they are awful. Mine was from dairy sensitivity, which I developed in my 50's. Bentyl worked well for me, hopefully it will for you too. These medications like morphine &all the others are a blessing and a curse. Hopefully your insides will settle down soon. You asked about the tens unit, I have had that used on me at pt, it seemed to relax my muscles around the knee a bit. I don't have it at home, but I think you can purchase them. Sorry to hear Charlie has gone backwards a little. I remember my rescue " Buddy" doing that too! Almost like they remembered something & got frightened all over again. It just took time for him to really trust us . Every time we took him in the truck he would drool like crazy. Our vet said it was because he was scared. Heaven knows where he thought we were taking him. Sometimes wish I knew what his life was like before we got him, probably better off not knowing, as I don't think he was treated well. Poor guy doesn't understand how to "play", he looks at you & walks away confused. We'll keep trying to loosen him up, he's come a long way. All we can do is give him a loving home for the rest of his life, can't fix the past. Good to hear your knee is doing well. I've Ben walking a lot better the last couple of days, not limping unless I've just woke up or at night when I'm tired.