Activated charcoal plays a role in the management of poisoning by adsorbing ingested poisons, thereby reducing their absorption into the bloodstream. However, its limitations include ineffectiveness against certain substances like heavy metals and corrosive chemicals, and the need for a high dose ratio to be effective.

Activated charcoal is used as an adsorbent in cases of poisoning, binding to molecules of the ingested poison to minimize systemic absorption. It is particularly effective for overdoses of certain drugs, such as cardiac glycosides and methylxanthines. However, it is not effective for heavy metals or corrosive substances, and the required dose is often underestimated, necessitating a ratio of at least 10 parts charcoal to 1 part poison for optimal efficacy.

Key points

Activated charcoal adsorbs poisons to reduce absorption.
Effective for certain drug overdoses (e.g., cardiac glycosides).
Ineffective against heavy metals and corrosive chemicals.
Requires a high dose ratio for effectiveness.

What is the role of activated charcoal in the management of poisoning, and what are its limitations?