It should be hours after Miracle-Mineral-Supplement ; because charcoal is an excellent toxin "sponge". It would absorb the Miracle-Mineral-Supplement as well. It would be very good for nausea. I assume it would be good for diarrhea too, as the diarrhea is caused by excess toxins initially.
Charcoal is amazing at how much stuff it can absorb. I always have it around in case of food poisoning or such as that. It should say "activated" charcoal. I think they all do. Your doo-doo will come out very dark.