25 stools per day. Eight to ten were normal and 15 were merely simple diarrhea. You will lose water which you must replace. If possible, replace it with boiled water, but at any cost drink quantities of liquids. You also must eat, even if that mans choking down food.
Charcoal can help.
Take any partially burned piece of wood, scrape off the charred portions and swallow them. Oh, about a handful. They are best if burned and ground into ash, but you can grind bones between rocks to a powder. Just swallow the powder. Steal some ordinary schoolroom chalk, powder it and swallow it.