Hey wantok,
Budesonide (Entocort), a more topical type of steroid, is only released in the Terminal Ileum and ascending colon. Being a steroid it is not recommended for long term use.
As far as maintenance meds are concerned then the 5ASA’s are it as far as being location specific is concerned as they too have a more topical effect as opposed to systemic. Pentasa is designed to be released throughout the small and large bowel whereas Salofalk (Mesalazine) is designed to be released in the Terminal Ileum and large bowel only.
Dusty. xxx