MDMA Antidotes: Can Charcoal Stop The Effects?

[bman1]

Swib had a friends who consumed 600mgs of mdma to avoid LE. The LE said they saw what this person did and took this person down to the station. At first they tried to make this person vomit. Said person refused. They than forced what the person said they told this person was liquid charcoal. The person stopped rolling shortly after.

Can liquid charcoal do this? If not, what can?
swib answered swibs own question with a little googling

Activated charcoal has often been used since ancient times to cure a variety of ailments including poisoning. Its healing effects have been well documented since as early as 1550 B.C. by the Egyptians. However, charcoal was almost forgotten until 15 years ago when it was rediscovered as a wonderful oral agent to treat most overdoses and toxins.

Could it be used with other substances in case of a bad tip or od, if so does anyone know what substances? Is it just mdma?