Does anyone know if Oxycontin is a blocker for Quaifenesin? I am trying to figure out why I have been feeling worse than usual and started wondering if maybe I am blocking some where, then I went on the internet to check Oxy and constipation and it said that Oxy is a form of Oxycodone, the same ingredient in Percodan and Percocet. I thought at least one of those had aspirin in it? Thanks to anyone that can help. Deanna