Fig. 7

Effect of treatment with the EP4 agonist, L-902,688, on citric acid-induced cough. Treatment of guinea pigs with 15 μl of L-902,688 (0.3 mg/ml; n = 9 and 1 mg/ml; n = 8, i.c.v.) did not affect the citric acid-induced cough response compared to vehicle (n = 7). Data are plotted as a scatter graph A and a bar chart B showing mean cough ± SEM