channel opener

synonym: channel activator
https://doi.org/10.1351/goldbook.14118
Compound that increases the conductance of an ion channel by a mechanism other than alteration of membrane potential or activation of the cognate receptor.
Examples: Retigabine, cromakalim
Source:
PAC, 2011, 83, 1129. (Glossary of terms used in biomolecular screening (IUPAC Recommendations 2011)) on page 1135 [Terms] [Paper]