We studied the efficacy and safety of the topically acting steroid bud
esonide in an oral preparation for controlled ileal release in an open
, uncontrolled trial. Twenty-one patients with active Crohn's disease
localized to the distal ileum, ileocaecal region or ascending colon, e
ntered the trial. The median age was 36 years and the median duration
of Crohn's disease was 8 years. The patients received budesonide, in a
controlled ileal release preparation, in a dose of 3 mg t.d.s. for 12
weeks, followed by a reduction to 2 mg t.d.s. for 6 weeks and finally
to 1 mg t.d.s. for an additional 6 weeks. Primary variables were the
modified Crohn's disease activity index (mCDAI), laboratory parameters
and plasma cortisol levels. The mean mCDAI at entry was 268 (+/- 71 s
.d.), dropping to 146 (+/- 91 s.d.) after 4 weeks of treatment and to
122 (+/- 87 s.d.) after a total of 12 weeks on 3 mg t.d.s. (P < 0.001)
. Following dose reduction, the mean mCDAI increased after 18 and 24 w
eeks of treatment. The erythrocyte sedimentation rate also fell signif
icantly during the study period. Eighteen patients responded favourabl
y during the first 12-week treatment period, and 13 completed the tria
l. Seven patients were withdrawn due to failure of treatment after red
uction of dose, and four of those were treated surgically. No serious
side-effects or significant corticosteroid-related side-effects occurr
ed. The mean plasma cortisol levels decreased, but remained within nor
mal range. Four patients were markedly suppressed on the highest dose
of budesonide. The controlled ileal release of budesonide seems to be
beneficial in active ileal and ileocolonic Crohn's disease without cau
sing important side-effects.