ISSN:
1432-1041
Keywords:
salbutamol
;
asthma
;
beta-adrenoceptor
;
controlled release formulation
;
adverse effects
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Medicine
Notes:
Summary The purpose of the present study was to compare the efficacy and systemic effects of 4 mg and 8 mg doses of salbutamol controlled release (SCR) after single dosing and at steady state in patients with asthma. Fifteen asthmatic patients (Age 36 y, FEV1 85% predicted) were given SCR 4 mg and 8 mg twice daily for 7 days in a randomised double-blind cross-over design, with at least 7 days washout between treatments. There were no differences between the bronchodilator effects of 4 mg and 8 mg doses. There was no evidence of tolerance to the bronchodilator effects after chronic dosing. Morning and evening PEFR measurements also showed improvements during treatment with SCR 4 mg and SCR 8 mg, although there were no differences between the two formulations. Both doses of SCR caused significant objective tremor responses which were maintained after chronic dosing. The 8 mg dose produced a larger tremor response after single dosing, but not at steady-state. Subjective tremor occurred in 7 patients with SCR 8 mg, and in 2 patients with SCR 4 mg. There were no cardiac arrhythmias on Holter ECG monitoring. These results suggest that the 8 mg dose of SCR was no more effective than the 4 mg formulation, and was associated with more systemic adverse effects.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00315111
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