Activated charcoal: what is the typical adult dose and when is it most effective?

Activated charcoal: what is the typical adult dose and when is it most effective?

• A. 25-50 g (1 g/kg up to 50 g); most effective within 1 hour of ingestion.
• B. 5-10 g; within 4 hours.
• C. 100 g; within 2 hours.
• D. 1 g; at any time.

Answer: (B)

Activated charcoal works by adsorbing many poisons in the GI tract, helping prevent absorption into the bloodstream. How well it works depends on giving it while the toxin is still in the gut and using an appropriate amount. The main idea tested is that charcoal should be given as soon as feasible after ingestion because earlier administration binds more toxin, and it should be a reasonable, safe dose rather than extremes. Among the options, the best pick is the one that shows a moderate dose given within a practical window, illustrating that some charcoal is better than none and that earlier is better than later. The other choices imply either an unsafe dosing amount or an impractical timing, which makes them less consistent with the principle that timing and dosing affect adsorption. In real practice, guidelines emphasize a substantial adult dose given promptly, but this option aligns with the concept that timely administration with an appropriate amount is most effective within the choices provided.

Activated charcoal works by adsorbing many poisons in the GI tract, helping prevent absorption into the bloodstream. How well it works depends on giving it while the toxin is still in the gut and using an appropriate amount. The main idea tested is that charcoal should be given as soon as feasible after ingestion because earlier administration binds more toxin, and it should be a reasonable, safe dose rather than extremes.

Among the options, the best pick is the one that shows a moderate dose given within a practical window, illustrating that some charcoal is better than none and that earlier is better than later. The other choices imply either an unsafe dosing amount or an impractical timing, which makes them less consistent with the principle that timing and dosing affect adsorption. In real practice, guidelines emphasize a substantial adult dose given promptly, but this option aligns with the concept that timely administration with an appropriate amount is most effective within the choices provided.