What is often the first sign of Zinc poisoning?

Zinc poisoning commonly presents with gastrointestinal symptoms, and nausea is frequently one of the first signs that individuals may experience. This is due to zinc's irritant effect on the gastrointestinal tract when ingested in excessive amounts, leading to inflammation and upset.

Nausea can be accompanied by other symptoms such as vomiting and abdominal pain, making it a significant early indicator of zinc toxicity. In contrast, while fever and respiratory distress can occur in various poisoning scenarios, they are not typically the initial signs of zinc poisoning. Vision changes can occur with certain types of poisoning, but they are not associated with zinc toxicity. Thus, the recognition of nausea as a primary sign of zinc poisoning is crucial for timely medical intervention.