you don't say why the doctor put you in corticosteroid but i guess its for inflammatory.
so whats about stopping budesonide and switching to other treatment for Irritable Bowel Disease that is not corticosteroid type
you might face rebound effect, depend on the time you have taking budesonide, it will re-upregulte glucocorticoid cascade hypothesis.
i don't know much about inflammatory medications, but what i know is there some medically used antibodyس for treat inflammatory of COPD acne etc.. they aren't made specifically for Irritable Bowel Disease but they are strong look this one of them >>OMALIZUMAB
It has been used to try to control severe allergic asthma, which does not respond to high doses of corticosteroids
she have 29 day half life, she will decrease the body production of histamine but not in CNS, because antibody are big, so they can't cross blood brain barrier, that will make its non-sadative and will not decrease your cognitive performance
its not
just talk to your doctor about this, she will guide you.