Which of the following is NOT a symptom of pesticide overexposure?

In the context of pesticide overexposure, it is essential to understand the typical symptoms that can arise from such an event. Blurred vision, nausea, and tightness of the chest are all recognized symptoms associated with pesticide toxicity. They indicate the body's adverse reaction to harmful chemical exposure. Blurred vision can result from neurological impacts, nausea often reflects gastrointestinal distress, and tightness of the chest may signal respiratory issues or an allergic reaction.

In contrast, increased stamina is generally not a symptom of pesticide overexposure. Instead, overexposure to pesticides typically leads to fatigue and various debilitating symptoms due to the impact on the body, rather than an enhancement of physical performance or energy levels. Therefore, the presence of increased stamina in this context is inconsistent with the physiological effects caused by pesticide toxicity, making it the correct choice as it is not a symptom associated with pesticide overexposure.