For me taking an NSAID is a guarantee of insomnia. And many other meds including virtually any drug for depression. I have restless legs and periodic limb movement syndrome that is exacerbated by a very wide spectrum of drugs. Yesterday I was awake for 48 hours. I am able to sleep better on my side than my back, but since I am recovering from surgery 8 weeks ago I can't sleep on my side anymore. If I get 5 hours a night that's a really good night for me.