4 mg (two 2-mg tab or 10 mL syr) 3-4 times daily. If inadequate bronchodilation, each single dose may be gradually increased up to 8 mg or 20 mL syr. Elderly patient or those known to be sensitive to β-adrenergic stimulating drugs
Initially 2 mg 3-4 times daily. Childn >12 yr
2-4 mg (one to two 2-mg tab or 5-10 mL syr); 6-12 yr
2 mg (one 2-mg tab or 5 mL syr); 2-6 yr
1-2 mg (½ to one 2-mg tab or 2.5-5 mL syr). Doses are to be taken 3-4 times daily.