Activated charcoal is given to patients who have ingested certain substances because it:

Activated charcoal is given to patients who have ingested certain substances because it:

• A. A direct antidote for many toxic substances
• B. Binds to the substance and prevents absorption
• C. Decreases absorption of poisons into the lungs
• D. Induces vomiting and empties the stomach

Answer: (B)

Activated charcoal works by adsorption in the gastrointestinal tract. It binds many ingested toxins, forming a complex that stays in the gut and is excreted in the stool. By binding the substance, it prevents its absorption into the bloodstream, reducing systemic exposure and helpful effects. It is not a direct antidote and does not affect the lungs or cause vomiting or gastric emptying; its role is to limit absorption after ingestion. Timing matters, since it’s most useful when given soon after exposure.

Activated charcoal works by adsorption in the gastrointestinal tract. It binds many ingested toxins, forming a complex that stays in the gut and is excreted in the stool. By binding the substance, it prevents its absorption into the bloodstream, reducing systemic exposure and helpful effects. It is not a direct antidote and does not affect the lungs or cause vomiting or gastric emptying; its role is to limit absorption after ingestion. Timing matters, since it’s most useful when given soon after exposure.