I agree with cougar... Oxy's though they work well for pain will give you another one... It's called withdrawal..back pain like you have isn't going away anytime soon right?? Stick with the Tylenol and if the bad pain is still there at night a oxycodone at night. Nothing more than 10 mg.. I hope the best for you and addictions to these things are horrible .if you take oxycodone take the term use as directed seriously.