What is a primary effect of moderate toxicity pesticides when ingested?

Moderate toxicity pesticides can cause a range of health effects when ingested, with nausea and vomiting being a primary symptom. This reaction occurs because the gastrointestinal system is sensitive to toxic substances, leading to its attempt to expel the toxin from the body. Nausea often precedes vomiting and serves as a protective mechanism when the body detects harmful chemicals.

While immediate death is associated with highly toxic pesticides, moderate toxicity typically does not result in such severe outcomes. Skin irritation and allergic reactions are also issues related to pesticide exposure, but they are more pertinent to dermal contact or allergies rather than ingestion. Thus, the manifestation of nausea and vomiting signifies the body's immediate response to mitigate the effects of the pesticide, underscoring the importance of recognizing these symptoms for prompt medical attention.