Ag. Gazis et al., The effect of six weeks topical nasal betamethasone drops on the hypothalamo-pituitary-adrenal axis and bone turnover in patients with nasal polyposis, CLIN OTOLAR, 24(6), 1999, pp. 495-498
Betamethasone topical nasal drops may have systemic corticosteroid activity
and cause suppression of the hypothalamo-pituitary-adrenal (HPA) axis and
impairment of bone turnover. The aim of this study was to assess the effect
of a standard 6-week regime of betamethasone topical nasal drops on the HP
A axis (using a physiological dose (1 mu g) ACTH test) and on bone turnover
(using markers of bone turnover, urinary deoxypyridinoline and serum bone
specific alkaline phosphatase). Eleven patients with nasal polyposis were i
ncluded in a prospective cohort study. Plasma cortisol was lower after beta
methasone treatment at all time intervals (P < 0.0001). There was no change
in urinary deoxypyridinoline corrected for creatinine or bone specific alk
aline phosphatase. Six weeks' treatment with recommended doses of betametha
sone suppresses the HPA axis, but has no significant effect upon markers of
bone turnover. Topical betamethasone in subjects with nasal polyps should
be viewed as systemic corticosteroid administration and the long and short-
term sequelae should be borne in mind.