15 min before ET-1, rats received vehicle (5 μl), dipyridamole, nicardipine or CFTRinh-172 (all 1 μg in 5 μl/paw). Paw withdrawal thresholds were measured 15, 20, 25 & 30 min after ET-1 administration. Neither dipyridamole, nicardipine nor CFTRinh-172 affected ET-1 SDH (P=N.S., two-way repeated measures ANOVA, N = 6), however CFTRinh-172 significantly attenuated ET-1 hyperalgesia (2-way ANOVA with Dunnet’s post hoc test, *P<0.05). Note that the ET-1 alone data is the same group as in Figure 1.