Indications: Tulobuterol is indicated for prophylaxis and control of bronchospasm in bronchial asthma, chronic bronchitis, asthmatic bronchitis, pulmonary emphysema, bronchiectasis, tracheobronchitis with emphysema and other bronchospastic disorders and conditions characterized by bronchoconstriction. Because oral tulobuterol is long acting, it is ideally suited for routine maintenance therapy in chronic asthma and chronic bronchitis. Tulobuterol has been shown in controlled single and multiple-dose studies to be more effective than terbutaline and fenoterol and at least as effective as salbutamol (albuterol) in relieving bronchospasm associated with reversible obstructive airways disease such as asthma, and also chronic bronchitis and emphysema. Clinically significant improvement in pulmonary function, as demonstrated by an increase in FEV of 15% or more, occurred within 30 minutes after oral dosing with peak improvement occurring within two to three hours. In some patients, a therapeutic response was still apparent at 12 hours. Continued effectiveness was demonstrated over a one-year period.