My husband is also stage 4. I read that alot of stomach pains can be nerve related. His pain Dr started him on Lyrica. He takes one before bed. It has helped him sleep and has been extremely helpful with stomach pains. Since he’s been taking the Lyrica he’s been more active and much less pain. 🤷‍♀️🤷‍♀️. Could be coincidental but also a miracle drug at the same time. I’ve taken lyrica for nerve pain and I suggested it.