Potassium Channels potassium channel 3 Acanthaceae 2 Analgesics 2 Analgesics, Non-Narcotic 2 Animals 2 Article 2 Clinacanthus nutans extract 2 Humans 2 Mice 2 Plant Extracts 2 Plant Leaves 2 analgesic agent 2 animal 2 animal experiment 2 animal model 2 antinociception 2 antinociceptive agent 2 apamin 2 atropine 2 bradykinin 2 caffeine 2 capsaicin 2 charybdotoxin 2 chemistry 2 controlled study 2 glibenclamide 2 glutamic acid 2 haloperidol 2 human 2