Which antidote is indicated for calcium channel blocker toxicity?

Calcium channel blocker toxicity can lead to potentially life-threatening cardiovascular effects, including bradycardia and hypotension. The correct antidote in this situation is calcium gluconate. Calcium gluconate acts as a calcium source that can help restore normal myocardial contractility and electrical activity of the heart. In cases of calcium channel blocker overdose, the administration of calcium gluconate can counteract the effects of the blockage on calcium channels, improving cardiac function and stabilizing the patient's condition.

While other substances might have specific uses in different types of poisonings or overdoses, they do not address the underlying issue of calcium channel blockade. For instance, sodium nitrate is used primarily for cyanide poisoning, Antizol is indicated for methanol poisoning, and sodium thiosulfate serves as an adjunct remedy for cyanide toxicity. Therefore, in the context of calcium channel blocker toxicity, calcium gluconate is the most appropriate and effective antidote.