Prednisone
"I have a rare disorder called Eosinophilic Esophagitus. It causes extreme stomach pain to the point where I can't eat for days or even drink water without being in severe pain. 10 days on Prednisone (20mg) and Pantoprazole (40mg) and it's about 80% better. I still get pain and sometimes can't eat or drink for a while, but it's completely different than what it was just two weeks ago. The only downside is Prednisone hasn't helped with my chronic pain. But I'm not too disappointed because that wasn't the main reason for getting it."