Activated charcoal is commonly taken by mouth to treat poisonings. It is also used for intestinal gas (flatulence), high cholesterol, hangovers, upset stomach, and bile flow problems (cholestasis) during pregnancy. Activated charcoal is applied to the skin as part of bandages for helping heal wounds.Activated charcoal is sometimes used to help treat a drug overdose or a poisoning. When you take activated charcoal, drugs and toxins can bind to it. This helps rid the body of unwanted substances. ... It becomes "activated charcoal" when high temperatures combine with a gas or activating agent to expand its surface area.Remember that activated charcoal can bind to vitamins, nutrients, and medications, so take it on an empty stomach and allow two to three hours before eating. And if believe you've been poisoned or are seriously ill, go to the ER immediately, or call your doctor.Activated charcoal is created by heating common charcoal to make it more porous. The extra spaces in the charcoal trap gas molecules, reducing the gas that causes bloating. Activated charcoal also whitens teeth