Hypersensitivity. Discontinue immediately if paradoxical bronchospasm occurs. Avoid contact w/ the eyes. Patients predisposed to glaucoma, insufficiently controlled DM, recent MI, severe organic heart or vascular disorders, hyperthyroidism, phaeochromocytoma, risk of narrow-angle glaucoma, prostatic hypertrophy or bladder-neck obstruction. Patients w/ underlying severe heart disease eg, ischaemic heart disease, arrhythmia or severe heart failure. Monitor serum K levels. Cystic fibrosis. Acute, rapidly worsening dyspnoea. Avoid prolonged use. Hepatic or renal insufficiency. May impair ability to drive or operate machinery. Pregnancy & lactation.