Activated charcoal is contraindicated in ingestion of which substances?

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Multiple Choice

Activated charcoal is contraindicated in ingestion of which substances?

Explanation:
Activated charcoal adsorbs many toxins in the GI tract, preventing absorption, but it is not effective for caustic substances. Ingested acids or alkalis cause direct tissue injury to the esophagus and stomach, and charcoal cannot neutralize or prevent that damage. Giving charcoal in caustic ingestions can also keep the chemical in contact with damaged mucosa and increase the risk of aspiration if vomiting occurs, and it can hinder later endoscopic evaluation. For these reasons, charcoal is contraindicated when caustic (acid or alkaline) substances are ingested.

Activated charcoal adsorbs many toxins in the GI tract, preventing absorption, but it is not effective for caustic substances. Ingested acids or alkalis cause direct tissue injury to the esophagus and stomach, and charcoal cannot neutralize or prevent that damage. Giving charcoal in caustic ingestions can also keep the chemical in contact with damaged mucosa and increase the risk of aspiration if vomiting occurs, and it can hinder later endoscopic evaluation. For these reasons, charcoal is contraindicated when caustic (acid or alkaline) substances are ingested.

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