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Activated Charcoal: Uses, Mechanism and Side Effects

Dr Roger Henderson
Reviewed by Roger HendersonReviewed on 29.04.2024 | 3 minutes read
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Activated charcoal is a fine black powder with an impressive ability to bind toxins and chemicals, making it a go-to treatment in emergencies involving drug overdoses or poisoning. While often associated with its role in hospital settings, it is also used in various commercial products and home remedies for digestion and detoxification purposes. When used in acute poisoning cases, activated charcoal works most effectively if administered within one hour of toxin ingestion, although there are exceptions where later administration is beneficial, particularly in cases involving slow-releasing substances or massive doses of poison.

Who is Activated Charcoal for?

Activated charcoal is suitable for individuals of all ages because it isn’t absorbed into the body. Instead, it works in the digestive system, passing through without entering the bloodstream. However, dosing varies by age and weight

  • Adults and Teens standard dosing typically aligns with the quantity and type of poison ingested.
  • Children under 12 require lower doses to match their smaller body weight and stomach capacity.

While effective for ingested poisons, activated charcoal doesn’t work for toxins absorbed through the skin, inhaled chemicals, or injected substances. Always consult medical professionals promptly when poisoning is suspected.

How does Activated Charcoal work?

The secret lies in its porous structure. Activated charcoal undergoes a special treatment process that creates millions of tiny holes, increasing its surface area and enhancing its adsorption properties. This means that toxins and drugs chemically bind to its surface, becoming trapped within the charcoal particles.

When ingested, activated charcoal remains in the gastrointestinal tract and prevents the body from absorbing harmful substances by limiting their transition from the stomach into the intestines. The sooner it’s administered, the more effective it is, as absorption by the intestines begins shortly after ingestion. However, in cases of sustained-release medications or exceptionally high doses, repeated doses of activated charcoal may be warranted to maximize its toxin-trapping ability.

Should anyone avoid taking Activated Charcoal?

Despite its wide safety margin, there are scenarios where activated charcoal should not be used:

  • Corrosive poisons - Substances like strong acids or alkalis can damage the stomach lining, and activated charcoal offers little protection.
  • Intestinal obstruction - If there is an existing blockage, activated charcoal can worsen the condition.
  • Prior to diagnostic procedures - It may interfere with the visibility of the stomach during an endoscopic examination.

Additionally, patients must avoid delaying medical treatment while attempting to use activated charcoal at home. Its use should complement, not replace, urgent medical care.

Are there any side effects to Activated Charcoal?

Activated charcoal will turn your poo black, however this is not harmful.

As with any medications, some people are bound to get some unwanted side effects. Some of the common ones include constipation, diarrhoea and headaches.

Additional Applications of Activated Charcoal

Beyond emergency use, activated charcoal has been incorporated into various products for its alleged detoxifying properties:

  • Digestive Health - It’s found in some over-the-counter remedies aimed at reducing gas and bloating.
  • Skin Care - Charcoal masks and cleansers use its adsorptive powers to remove impurities from the skin.
  • Water Filtration - Charcoal is often used in filters to remove toxins and impurities from drinking water.

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Dr Roger Henderson
Reviewed by Roger Henderson
Reviewed on 29.04.2024
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