Bitolterol mesylate

(bye-TOHL-ter-ohl] Pregnancy Category: C Tornalate Aerosol (Rx) Classification: Bronchodilator

See also Sympathomimetic Drugs. Action/Kinetics: Bitolterol is a pro-drug in that it is converted by esterases in the body to the active colterol. Colterol combines with beta-2-adrenergic receptors, producing dilation of bronchioles. Minimal beta-1-adrenergic activity. Onset following inhalation: 3-4 min. Time to peak effect: 30-60 min. Duration: 5-8 hr.

Uses: Prophylaxis and treatment of bronchial asthma and bron-chospasms. Treatment of bronchitis, emphysema, bronchiectasis, and COPD. May be used with theo-phylline and/or steroids. Special Concerns: Safety has not been established for use during lactation and in children less than 12 years of age. Use with caution in is-chemic heart disease, hypertension, hyperthyroidism, diabetes mellitus, cardiac arrhythmias, seizure disorders, or in those who respond unusually to beta-adrenergic agonists. There may be decreased effectiveness in steroid-dependent asthmatic clients. Hypersensitivity reactions may occur.

Additional Side Effects: CNS: Hy-peractivity, hyperkinesia, lighthead-edness. CV: Premature ventricular contractions. Other: Throat irritation. Drug Interactions: Additive effects with other beta-adrenergic bron-chodilators.

How Supplied: Metered dose inhaler: 0.37 mg/inh; Solution: 0.2%

Dosage-

• Metered Dose Inhaler

Bronchodilation.

Adults and children over 12 years: 2 inhalations at an interval of 1-3 min q 8 hr (if necessary, a third inhalation may be taken). The dose should not exceed 3 inhalations q 6 hr or 2 inhalations q 4 hr.

Prophylaxis of bronchospasm.

Adults and children over 12 years: 2 inhalations q 8 hr.

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