Table 1.

Mean (s.d.) urinary salbutamol (µg) following 5 × 100 µg salbutamol doses.

Collection period (min)	ORAL	MDI	MDI + C
0–30	0.42 (0.55)	11.01 (3.77)	11.66 (3.68)
30–40	0.84 (1.20)	4.63 (2.63)	3.92 (1.89)
40–60	2.48 (2.89)	6.81 (4.47)	7.81 (5.54)
60–120	11.53 (10.23)	14.22 (5.34)	10.35 (6.55)
Cumulative amount	15.27 (14.05)	36.66 (12.23)	33.75 (14.28)