Activated charcoal indications include which of the following scenarios?

• A. Bacterial infection
• B. Oral poisoning and medication overdoses
• C. Hypoglycemia
• D. Hypertension

Answer: (B)

Activated charcoal works by adsorbing many organic toxins in the GI tract, so it’s used when someone has swallowed a toxin or overdose that can be bound to charcoal and the treatment is given within a time window where it can still reduce absorption. The best indication is oral poisoning or medication overdoses, provided the substance is one that charcoal can adsorb and the patient’s airway is protected. It’s most effective when given soon after ingestion, though the exact window can vary by toxin. It is not a treatment for bacterial infection, hypoglycemia, or hypertension, because charcoal does not treat infections, cannot correct low blood sugar, and does not rapidly or reliably lower blood pressure.