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Twice daily inhalation of a new corticosteroid, budesonide, in the treatment of chronic asthma.

The efficacy and side-effects of a new corticosteroid, budesonide, was assessed by comparison with beclomethasone dipropionate in double-blind, cross-over study of 30 patients with chronic asthma. The treatment regimens were budesonide 200 micrograms twice daily by conventional pressurized aerosol with a tube spacer attached and beclomethasone 100 micrograms four times daily via a conventional inhaler. Each treatment was given for four weeks. Results were analyzed using Student's t-test for paired comparisons. No significant differences were found for morning and evening peak flow rates, symptom scores, bronchodilator inhaler usage or forced vital capacity. Forced expiratory volume in one second after 4 weeks on each treatment was significantly higher following budesonide therapy (p less than 0.05), but the absolute changes were small and unlikely to be of clinical relevance. There were no major side-effects during either treatment period, but compared with pre-treatment levels serum creatinine and lactic dehydrogenase levels rose significantly during treatment with budesonide (p less than 0.01 and p less than 0.05 respectively). None of these results reflected clinically important biochemical or haematological changes. There was a significant reduction in neutrophil counts following treatment with beclomethasone (p less than 0.05). In the short term treatment of chronic asthma, budesonide administered twice daily is as effective as four times daily beclomethasone. A twice daily dosage regimen should improve patient compliance with therapy.