As a rule, antihistamines are prescribed for allergies. If there was a fact of taking a product that causes an allergy, then, of course, taking an absorbing agent (activated carbon is one of them) is necessary after a meal.
Senchilo Stanislav Igorevich
No need to chew. It is necessary to wash down the tablets with water. 1 tablet per 10 kg of body weight in the morning on an empty stomach for a month. However, besides constipation and staining of the stool in a black-green color, this method of treatment does not give.
In order to answer this question, it is necessary to understand the cause of the allergy, and activated charcoal does not cure allergies ... Drugs from the group of histamine receptor blockers and a number of others are prescribed.