The drug not used in acute asthma is :

Only bronchodilator drugs are useful for the treatment of an acute attack of asthma. Main drugs are: Beta 2 agonists e.g. salbutamol, terbutaline Anticholinergics e.g. ipratropium, tiotropium Methylxanthines e.g. theophylline Other drugs used for asthma (like mast cell stabilizers, leukotriene receptor antagonists and lipoxygenase inhibitors) are indicated only for prophylaxis.