muscle spasm
"I have been suffering from a dull and persistent pain on the right side of my abdomen near my rib cage for several months. I had blood tests and abdominal ultrasound with results indicating "normal" appearance.  The pain persisted and I could control it to some extent (not great) with Tylenol extra strength.  Then I asked my doctor to prescribe 10mg baclofen, which I have been taking 3 times daily for about two weeks.  I noticed my abdominal pain eased after 2 days of the medication.  I haven't been experiencing abdominal pain except on rare occasion since I have been taking baclofen.  I feel totally functional and thankful that I don't have to live in pain any longer."