Table 1.

Effects of different drug on the ammonia liquor induced cough in mice.

Group	Dose (mg/Kg)	No. of Animals	Latent Period Cough (s)	No. of Coughs	Inhibition (%)
Control	5% CMC	10	27.20 ± 5.73	42.30 ± 3.55	-
Codeine phosphate	30	10	51.50 ± 5.41*	16.98 ± 2.33*	59.86
1-MHD	100	10	38.20 ± 9.69*	16.54 ± 1.96*	60.90
2	100	10	41.00 ± 4.25*	15.80 ± 3.12*	62.65

Values expressed as mean ± SD. (n = 10), * p < 0.05, for comparison to treated groups with control.