What is the primary function of an antidote when dealing with pesticide exposure?

The primary function of an antidote in the context of pesticide exposure is to reverse the effects of poisoning. When a person is exposed to a pesticide, various toxicological effects can manifest, potentially leading to serious health issues or even death. An antidote specifically targets the toxic substance, neutralizing its effects or mitigating the harm caused by it. This reversal is crucial in emergency situations where swift action can significantly impact the outcome for the affected individual.

While enhancing effectiveness and increasing resistance might seem beneficial in some contexts, they do not directly address the immediate dangers posed by pesticide exposure. Preventing harm is essential, but once exposure has occurred, the antidote's role becomes vital in correcting the adverse effects already set in motion by the toxin. Thus, the option focusing on reversing the effects of poisoning directly correlates with the purpose of an antidote in this scenario.