Fig. 3.
Absence of a secondary increase in the capsaicin current when bupivacaine is present after washout of capsaicin. The left panel shows the control capsaicin-induced current, the middle panel the capsaicin-induced current in the presence of bupivacaine, and the right panel the recovery capsaicin-induced current (after bupivacaine). The bars at the top of each trace indicate the time of perfusion with capsaicin and bupivacaine. CAP, 1 μM capsaicin; BUP, 1 mM bupivacaine. The traces were recorded approximately 1 min apart.