I was switched from diclofenac to sulindac. I have been on sulindac a couple of weeks and all my?

I looked up both medications I am by no means a pharmacist a scientist or doctor or any of those things I am simply just a person with pain on medication seeking answers as well so it says that the Diclofenac. reduces substances in the body that causes pain whatever that means and the sulindac reduces hormones that cause inflammation. It sounds to me that the two medications are similar.. ?? I really hope and pray you can get better feedback and most of all some pain relief.
God bless and good luck
Winnie