Can charcoal capsules be taken for diarreha( no vomiting) from food piosoning and if so should oral rehydration be used before charcoal capsules?

Would avoid.: Diarrhea without vomiting caused by food poisoning is usually self limiting and doesn't require specific treatment if you are generally well that is no fever no dizziness no multiple exhausting bowel movements . The main side effect of charcoal is diarrhea and there is no evidence it is helpful in this condition. If you have diarrhea it always helps to increase your fluid intake.