How do you take Activated Charcoal?

For poisoning emergencies, the usual adult dose is 50 to 100 grams (mixed with water to form a slurry) taken by mouth as soon as possible after swallowing the poison. For gas and bloating, take 500mg to 1g (2 to 4 tablets of Ultracoal 250) after meals or when you feel bloated. Swallow with a full glass of water. It works best when taken within one hour of swallowing a harmful substance.

What are the side effects of Activated Charcoal?

Black-coloured stool (this is normal and harmless), constipation, nausea or vomiting, mild stomach discomfort

Who should not take Activated Charcoal?

People who have swallowed strong acids, alkalis (like bleach), or petroleum products like kerosene should not take charcoal, as it will not help and may cause more harm. People with intestinal blockage or holes in the gut should not take it. Do not give to someone who is unconscious or having convulsions without medical supervision.

OTC

Adsorbent / Antidote

Activated Charcoal

Q: What is Activated Charcoal used for?

Poisoning, accidental swallowing of harmful substances, drug overdose, stomach gas and bloating

Last reviewed July 2026

Who is this for?

For adults (18+). Standard adult dosing applies: see the How to Take tab for full instructions.

What is this drug?

Activated charcoal is a specially treated form of carbon that works by trapping poisons and chemicals in your stomach and intestines, preventing your body from absorbing them.

How it works

Binds to toxic substances, drugs, and their metabolites through non-specific adsorption onto its porous surface, preventing gastrointestinal absorption and facilitating fecal elimination; also reduces gas production by adsorbing fermentation byproducts and intestinal gases.

What is it used for?

Poisoningaccidental swallowing of harmful substancesdrug overdosestomach gas and bloating

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Sepsis & Severe Infections

Available Over The Counter

Get this from any pharmacy or chemist: no prescription needed.

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What to watch out for

Activated charcoal is NOT a cure-all detox, so ignore claims on social media that it 'cleans your body' of everyday toxins. In poisoning emergencies, always rush to the nearest hospital even after giving charcoal, as it is first aid, not a replacement for proper medical care. Buy only from reputable pharmacies and look for known brands like Ultracoal 250 rather than unbranded products from roadside sellers.

Common Side Effects

Black-coloured stool (this is normal and harmless)
constipation
nausea or vomiting
mild stomach discomfort

Serious Side Effects

Difficulty breathing or choking (especially if charcoal enters the lungs)
severe stomach pain or swelling
or signs of intestinal blockage such as inability to pass stool or severe vomiting: go to the hospital immediately if any of these happen.

Drug Interactions

Activated charcoal can reduce the effectiveness of almost any medicine you take by mouth, including malaria drugs, antibiotics, and contraceptive pills. If you are on any regular medication, take it at least 2 hours before or 1 hour after taking activated charcoal. It can also reduce the absorption of vitamins and supplements.

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Pregnancy & Breastfeeding Warning

Activated charcoal is generally considered safe in pregnancy and breastfeeding for emergency poisoning use, but consult your doctor before using it regularly for gas or bloating.

Who Should NOT Take This

People who have swallowed strong acids
alkalis (like bleach)
or petroleum products like kerosene should not take charcoal
as it will not help and may cause more harm. People with intestinal blockage or holes in the gut should not take it. Do not give to someone who is unconscious or having convulsions without medical supervision.

How to Store

Store in a cool, dry place away from direct sunlight and heat, as Nigerian weather can be very hot, so avoid storing near windows or in your car. Keep the container tightly closed to prevent moisture from getting in. Always keep out of reach of children.

For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.