I had severe back pain two days ago. I went to an urgent care center and the PA-C prescribed diclofenac sodium 75mg tablets and cyclobenzaprine 10mg tablets. I took the recommended dosages, once home, and the next day I still felt pain. I took two acetaminophen, 650mg tablets, every two to three hours in an eight hour period for relief. I also repeated with six tablets the next day. The pain has lessened, but I feel as if I have taken too much and I am trying to drink lots of fluids to flush my system.