As if you guys didn't know, Advil, aspirin works sometimes better than hydrocodone!!!! I took hydro around the clock for 2 three nights and every 3 to 4 hours daily still didn't get muck relief nor could I sleep. Got up this morning and too 2 Acetaminophen, got relief in about 30 mins. !!!! Sooo now I can think clearly. It was my back now its my back and my knee. I was ready to go to the ER. At least I can take aspirin until I find out what's going on. anyway said all that to say guys, try the aspirin first when hit with pain. God bless