What Is A Safe And Effective Medication For Ongoing Stomach Pain And Indigestion In Someone With GERD And Gallstones?

Hi. My older daughter has had digestive issues for a few years with GERD/Acid reflux, etc. Now, she s been having stomach pains after she eats. What is a good medication that she can take for stomach pains that will also work for indigestion? She recently discovered that she has gallstones but the doctors aren t sure they re causing the pain after she eats. However, surgery is out of the question. She was prescribed Baralgin for the stomach pain, but the discomfort after she eats is a cycle and she cannot be on Baralgin for too long. A good over the counter or safe and effective prescription medication recommendation would be appreciated.