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Salbutamol has a duration of action of 4 to 6 hours in most patients.
Increasing use of beta2-agonist may be a sign of worsening asthma. Under these conditions a reassessment of the patient's therapy plan may be required and concomitant glucocorticosteroid therapy should be considered.
As there may be adverse effects associated with excessive dosing, the dosage or frequency of administration should only be increased on medical advice.
Populations: The volumes of syrup quoted are based on a formulation strength of 2 mg salbutamol per 10 mL of syrup.
Adults: 10 to 20 mL of expectorant syrup (2 to 4 mg salbutamol) 2 or 3 times a day.
Children: 2 to 6 years: 5 to 10 mL of expectorant syrup (1 to 2 mg salbutamol) 2 or 3 times daily.
6 to 12 years: 10 mL of expectorant syrup (2 mg salbutamol) 2 or 3 times daily.
Over 12 years: 10 to 20 mL of expectorant syrup (2 to 4 mg salbutamol) 2 or 3 times daily.
