In cases of overdose, what key information should EMS obtain to assess the situation effectively?

Gathering the time of ingestion and the amount consumed is crucial in assessing an overdose situation because it allows EMS to determine the severity of the overdose and to make informed decisions about treatment. The timing indicates how long the substance has been in the patient's system, which is important for understanding the pharmacokinetics involved—how the substance is absorbed, distributed, metabolized, and eliminated. Knowing the amount consumed assists in evaluating the potential toxicity and the likelihood of requiring interventions such as activated charcoal or specific antidotes. This information can significantly impact the patient’s management in the field and during transport, guiding further treatment options and the need for specific interventions.