What is a common symptom of poisoning that affects the digestive system?

Nausea is a common symptom of poisoning that directly affects the digestive system. When a person ingests a toxic substance, the body often responds by trying to rid itself of the poison, which can lead to feelings of nausea and vomiting. This reaction is a protective mechanism aimed at expelling harmful substances from the body. Other symptoms associated with poisoning may involve multiple systems in the body; however, nausea specifically points to the digestive tract's reaction to the toxic substance.

In contrast, seizures, dizziness, and chest pain, while they can occur in some cases of poisoning, are not specifically indicative of issues related to the digestive system. Seizures may be related to neurotoxic agents, dizziness could stem from various systemic effects or dehydration, and chest pain could be related to other complications, but nausea specifically ties to the body's response within the gastrointestinal system.