Budesonide MMX is a low bioavailability corticosteroid oral once-daily formulation, which has a controlled rate of release throughout the colon, thanks to the multimatrix (MMX) formulation. It has been available for a decade in the USA and Europe for the induction of remission in patients with active, mild to moderate ulcerative colitis, particularly for those not responsive to mesalamine. The efficacy of budesonide MMX in this setting has been assessed by registrative randomized controlled trials showing a higher rate of clinical and endoscopic remission at 8 weeks compared with placebo, mostly in patients with proctosigmoiditis and left-side colitis.
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