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For Relief of Bronchospasm: Rapid-acting inhaled beta-2-agonists, such as salbutamol, should be used only on as-needed basis at the lowest dose and frequency required.
Adults and children more than 4 years old: 100 mg or 200 mg (1 or 2 inhalations) as needed every 4 to 6 hours, or as prescribed by a doctor.
The bronchodilator effect of each administration of salbutamol inhaler lasts for at least 4 hours. If a previously effective fixed dose fails to provide the usual relief, consult a physician for medical advice as this is a sign of worsening of asthma that would require reassessment of therapy.
For Prevention of Exercise-induced Bronchospasm: Adults: 200 mcg (2 inhalations) 15 to 30 minutes before exercise.
Children more than 4 years old: 100 or 200 mcg (1 or 2 inhalations) 15 to 30 minutes before exercise.
