Which of the following is a common antidote for both Carbon Monoxide and Cyanide poisoning?

The correct answer is Hydroxocobalamin, as it serves as an effective antidote for both Carbon Monoxide and Cyanide poisoning. Hydroxocobalamin is a form of vitamin B12 that binds to cyanide ions, forming a non-toxic complex that can then be excreted by the body. This property makes Hydroxocobalamin a vital treatment option in cases of cyanide exposure.

Furthermore, in cases of Carbon Monoxide poisoning, Hydroxocobalamin can help in reducing the levels of carboxyhemoglobin by promoting the elimination of carbon monoxide from the bloodstream. This dual effectiveness makes it a valuable tool in emergency poisoning situations.

In contrast, while Calcium Gluconate is used for treating specific types of poisoning, it is primarily geared toward calcium channel blocker overdose and some fluoride exposures, and does not have a recognized role in carbon monoxide or cyanide poisoning. Flumazenil is a benzodiazepine antagonist and is used primarily for reversing the effects of benzodiazepine overdose, making it irrelevant in the context of either carbon monoxide or cyanide. Lastly, stating that an antidote does not exist for cyanide is incorrect, as Hydroxocobalamin is indeed a specific antidote for it