My doctor thought I may have a stomach ulcer so he lowered some of my crohn's meds but my stomach has sharp pain, gas it is worse. How long do I wait?

Crohn's meds. The only Crohn's med that I can think of that would cause stomach ulcers is prednisone. This is not a long term medicine and should be used as little as possible. When taking prednisone you should also take a strong antacid to protect your stomach, like omeprazole or lansoprazole. Contact your doctor to let him know what you're feeling. .