Ginsenoside-induced relaxation of human bronchial smooth muscle via release of nitric oxide.

They dilate the bronchi by a direct action on the beta2-adrenoreceptors on the bronchial smooth muscle and relax the muscle.

The wheezing is typically caused by spasms of the bronchial muscles while stridor is related to upper airway obstruction secondary to swelling.

These drugs work by relaxing the bronchial smooth muscle in the lung, opening the airways and allowing more oxygen in as you breathe.

Low-pitched breathing is typically due to spasms of the muscles in the lower part of the airway (bronchial muscles).

Fredburg concluded that full expansion of the lungs had a more potent effect on bronchial smooth muscle than isoprenaline [25].

It relaxes the bronchial muscles.

Salbutamol sulfate is usually given by the inhaled route for direct effect on bronchial smooth muscle.

Astemizole competitively binds to histamine H1-receptor sites in the gastrointestinal tract, uterus, blood vessels, and bronchial muscle.

Through relaxation of bronchial smooth muscle it causes bronchodilation.