Minimum dose requirements of steroid-dependent asthmatic patients for aerosol beclomethasone and oral prednisone.

In 34 steroid-dependent asthma patients who improved markedly during 2 mo of treatment when progressively larger doses of beclomethasone aerosol were added to their oral prednisone regimen, we subsequently reduced both steroids to ascertain the minimum dose of each needed to prevent recurrence of significant asthmatic disability. After 80 wk of follow-up, 15 patients had successfully terminated oral prednisone; 19 were better controlled with a combination of aerosol plus oral steroid than with either drug alone; all patients previously unable to convert to alternate-day prednisone did so successfully during the combined therapy. The minimum effective maintenance dosage varied greatly among these patients-the median values being 2.5 mg prednisone and 1,200 microgram beclomethasone per day. The latter ranged from 200 to 1,8000 microgram. Only 4 patients were satisfactorily controlled without prednisone on 400 microgram beclomethasone per day or less. Seven needed extra intranasal beclomethasone to help control the nasal polyps which worsened after prednisone withdrawal. Suppression of plasma cortisol levels, apparently attributable to the beclomethasone, persisted in most patients, but on the average this was no worse than before commencing this treatment and valuable clinical improvement accrued. There were no other important complications of the regimen. In most of these patients with severe chronic asthma, optimum control of the disease required combined aerosol-oral therapy and maintenance doses of beclomethasone higher than those usually recommended. In some patients, effective control of chronic asthma by beclomethasone treatment may require acceptance of some persisting suppression of adrenal function as a considered risk.