To date, multiple epilepsy‐associated potassium channel mutant genes have been identified,13, 15 but only two drugs targeting potassium channels have been shown to have anti‐seizure effects, namely haloperidol and retigabine, a structural analog of haloperidol, both of which act on Kv7.2/Kv7.3 potassium channels.16 The gene discussed is KCNQ2; the disease is epilepsy.