Poisoning
An oral suspension of activated charcoal (AC) should be considered in poisonings when gastrointestinal decontamination of a xenobiotic is indicated, and AC can be administered within 1 hour of ingestion. Careful consideration of the contraindications (click here) should occur prior to treatment with activated charcoal.
The recommended target dose of AC was 1 g/kg of bodyweight, but at least tenfold the estimated weight of the suspected toxin, the maximum being 50 g.
Single dose activated charcoal for gut decontamination:
After ingestion of a potentially toxic substance, Single Dose Activated Charcoal (AC) is the most applied decontamination procedure [1]. It is easy to use, inexpensive and safe [2]. With increasing lag-time between toxin-ingestion and AC-application the efficacy of AC to decontaminate declines rapidly [3]. Thus, AC should be applied as soon as possible. Pre- and extra-hospital AC-application may shorten this lag time [4]. This implies AC application by non-medical persons (=laypersons). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5615092/
https://www.naturalmedicinejournal.com/journal/2013-08/activated-charcoal-bottom-line-monograph
It is also good to remove toxins from kidney patients
https://www.ncbi.nlm.nih.gov/pubmed/19238909
Oral activated charcoal in the treatment of intoxications. Role of single and repeated doses.
Activated charcoal for acute overdose:
see more here https://www.ncbi.nlm.nih.gov/pubmed/?term=Oral+activated+charcoal
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5182683/pdf/brforeignmcrev72717-0157.pdf
Best review http://webcache.googleusercontent.com/search?q=cache:VpLBriTisvsJ:www.mdpi.com/2073-4441/10/2/182/pdf+&cd=9&hl=en&ct=clnk&gl=us
medical and evironmental application of charcoal http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.893.7300&rep=rep1&type=pdf
Charcoal in food and drinks
http://blogs.discovermagazine.com/scienceandfood/2016/08/23/activated-charcoal/#.W4m_F-hKiUk