Hypersensitivity. Discontinue paradoxical bronchospasm immediately & substitute w/ an alternative therapy. Predisposed narrow-angle glaucoma, cystic fibrosis. Insufficiently controlled DM, recent MI, severe organic heart or vascular disorders, hyperthyroidism, pheochromocytoma, 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). Hypokalemia, dyspnoea. May lead to +ve results w/ regards to tests for non-clinical substance abuse eg, doping. Care must be taken not to allow solution or mist into the eyes. May impair ability to drive or operate machinery. Pregnancy & lactation.