The effect of salbutamol on bronchoconstriction induced by inhaled sodium metabisulphite has been studied in 12 atopic subjects. Salbutamol (200 micrograms, 3.5 x 10(-7) M) and matched placebo were administered by identical metered dose inhaler 15 min before a dose-response to sodium metabisulphite (1.25-100 mg ml-1) was performed. Geometric mean provocative dose of metabisulphite causing a 35%...

The delivery of bronchodilators with a metered-dose inhaler (MDI) and a spacer in mechanically ventilated patients has become widespread practice. However, the various ventilator settings that influence the efficacy of MDI are not well established. Application of an end-inspiratory pause (EIP) during drug delivery has been suggested as one of the factors that might increase the effectiveness of...

Introduction: In recent study both endothelium-dependent and endothelium-independent mechanisms have been reported for the action of β-adrenoceptor. The aim of this study was to investigate on the role of nitric oxide (NO) and cyclic guanosin monophosphate (cGMP) in vasodilation mechanisms of β2-adrenoceptors (β2-AR) in rat skin vessels. Methods: All drugs were injected subcutaneous into p...

This study was designed to determine whether resistance to the airway effects of the beta-agonist, salbutamol, would develop in three groups of subjects while taking large doses of inhaled salbutamol. Six normal non-atopic, six atopic non-asthmatic, and eight atopic asthmatic subjects were studied by an identical technique. The development of resistance was assessed from salbutamol dose-respons...

The bronchodilating responses to 400 micrograms salbutamol and 80 micrograms ipratropium bromide were studied in 188 patients with chronic bronchitis (n = 113) or asthma (n = 75) and mild to moderate airflow obstruction (forced expiratory volume in one second (FEV1) above 50% but below 2 SD of predicted value) in a crossover study on two days a week apart. Both the patients with asthma and the ...

Brown adipose tissue (BAT) activation increases glucose and lipid consumption; as such, it is been considered as a potential therapy to decrease obesity. BAT is highly vascularized and its activation is associated with a necessary increase in blood flow. However, whether increasing BAT blood flow per se increases BAT activity is unknown. To examine this hypothesis, we investigated whether an is...

SETTING States of Haryana, Karnataka, Maharashtra and Rajasthan, and Chennai (capital of Tamil Nadu State), India. OBJECTIVE To assess the availability, price and affordability of beclomethasone and salbutamol inhalers in five Indian states using a standardised methodology. DESIGN Data on the availability and price of two essential medicines for asthma, beclomethasone (50 microg/dose) and s...

Salbutamol-induced cardiac complications are well-established. Herein, we describe a case of a 24-year female who was admitted to the emergency department because of a suicide attempt with salbutamol (76 mg). Salbutamol abuse induced the development of supraventricular tachycardia and ventricular fibrillation. Regular sinus rhythm was restored with defibrillation. The hypokalemic patient who st...

In a double-blind controlled trial 14 chronic asthmatic patients with regular nocturnal exacerbations took 16 mg slow-release oral salbutamol (two Ventolin spandets), 450 mg slow-release aminophylline (two Phyllocontin Continus tablets), or placebo at midnight. Mean peak expiratory flow rates on waking were significantly higher on the active drugs than on placebo (p < 0.01 for salbutamol; p < 0...

The bronchodilator and cardiovascular activity of isoproterenol hydrochloride (Isuprel) 5.0 mg, Salbutamol 5.0 and 2.5 mg and saline administered by IPPB to 30 patients with chronic bronchial asthma were determined and compared. Equal doses of isoproterenol and Salbutamol had similar peak bronchodilator effect, but the peak effect was reached much earlier with isoproterenoL Salbutamol bad longe...