"Cation Channel Blocker"^^ . "Cation Channel Blocker"^^ . "Cation Channel BlockerPTNCI" . "Pharmacologic Substance"^^ . . "Cation Channel BlockersSYNCI" . "A group of agents that block the influx or efflux of positively charged ions through cell membrane.NCI" . "C93038"^^ . "C2985407"^^ . .