Rats	Cough Reflexes/5min
Rats	Control	10 mg/kg	20 mg/kg	50 mg/kg	100 mg/kg	200 mg/kg	300 mg/kg
Female	210 ± 23	234 ± 24	202 ± 28	186 ± 60	167 ± 6	165 ± 11	142 ± 13^**
Male	227 ± 25	206 ± 31	210 ± 22	196 ± 18	146 ± 11	167 ± 5^*	133 ± 19^***