Fig. 6

Effect of treatment with the EP2 agonist, butaprost, on citric acid-induced cough. Treatment of guinea pigs with 15 μl of butaprost (0.3 mg/ml; n = 8 and 1 mg/ml; n = 10, i.c.v.) did not affect the citric acid-induced cough response compared to vehicle (n = 11). Data are plotted as a scatter graph A and a bar chart B showing mean cough ± SEM