Nocturnal cortisol secretion in asthmatic patients after inhalation of fluticasone propionate.
OBJECTIVE
This study was designed to assess the relationship between the degree of airflow obstruction and the suppression of the hypothalamic-pituitary-adrenal axis after inhalation of fluticasone propionate (FP) in asthmatic patients with varying degrees of airway obstruction.


METHODS
The nocturnal cortisol production (from 10:00 PM to 6:00 AM), defined as the integrated area under the curve of nocturnal plasma cortisol, was measured following inhalation of a placebo or a single dose of 500 microg FP at 8:00 PM in 28 patients with mild to moderate asthma, in a single, blind, 2-night study.


RESULTS
The mean morning rise of cortisol decreased significantly following a single dose of inhaled FP. When the total nocturnal cortisol production after the second night (when the FP was inhaled) was compared to that after the first night (when the placebo was administered), it was found to have decreased by 29.4%. There was a statistically significant correlation between the FEV(1) and the fall in cortisol production just before the inhalation of FP (p < 0. 001). There was no correlation between baseline cortisol production and the fall in cortisol production.


CONCLUSIONS
Our findings suggest that the degree of airway obstruction affects the systemic bioavailability of FP. FP is likely to induce a more severe decrease in nocturnal cortisol secretion in less obstructed patients. In order to reduce the risk for systemic side effects, the patient's degree of airway obstruction should be considered when planning inhaled FP treatment.
Weiner
P
P
Department of Medicine A, Hillel-Yaffe Medical Center, Hadera, Israel.
Berar-Yanay
N
N
Davidovich
A
A
Magadle
R
R
D000280:Administration, Inhalation; D000293:Adolescent; D000328:Adult; D000730:Androstadienes / Q000008:administration & dosage / Q000009:adverse effects*; D018927:Anti-Asthmatic Agents / Q000008:administration & dosage / Q000009:adverse effects*; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage / Q000009:adverse effects*; D001249:Asthma / Q000097:blood / Q000188:drug therapy*; D001682:Biological Availability; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D000068298:Fluticasone; D005541:Forced Expiratory Volume / Q000187:drug effects; D006801:Humans; D006854:Hydrocortisone / Q000097:blood*; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects; D008297:Male; D010913:Pituitary-Adrenal System / Q000187:drug effects; D011208:Powders; D016037:Single-Blind Method
D000730:Androstadienes; D018927:Anti-Asthmatic Agents; D000893:Anti-Inflammatory Agents; D011208:Powders; D000068298:Fluticasone; D006854:Hydrocortisone