Final answer:
Activated charcoal may be indicated for a patient who ingested methanol, ethanol, iron, or aspirin. However, it is most effective for methanol or iron ingestion.
Step-by-step explanation:
Activated charcoal may be indicated for a patient who ingested methanol, ethanol, iron, or aspirin. However, in this case, activated charcoal may be most effective for a patient who ingested methanol or iron. If a patient ingests methanol, activated charcoal can help prevent its absorption into the bloodstream by binding to the methanol in the gastrointestinal tract. Similarly, activated charcoal can also be used for a patient who ingested iron to prevent its absorption.