I don’t know if activated charcoal will work well at that point but I do know it is absolutely a miracle cure for food poisoning.
I ran out of it and happened to get hit. I couldn’t go to the store because there wasn’t one close enough. I was digging through all my cabinets and found one lone capsule. It let me get to CVS and back. Once I took regular doses the problem was gone. You really need to start taking it when you feel the first symptom.
It works for any kind of gas issue.