"i recently had hip surgery and was in lots of pain after the operation. i tried ibuprofen and  voltaren with little relief. my doctor called in a script for feldene 20 mg twice a day for me. it helped so much with the pain bringing it to a manageable level but caused the most severe constipation. so after about 5 days i switched back to voltaren and the constipation eased up and thankfully the pain was better too."