NSTK · 01.2026Independent supplement reference
NutriStack
Edition 1.0Updated August 1, 2026

Supplement × Prescription·Evidence index

Activated Charcoal and Phenytoin: what the published research says

PubMed indexes 7 records that name Activated Charcoal and Phenytoin together, either in the title or in an interaction, co-administration, or pharmacokinetic context. Each one is listed below with its study design and, where the abstract states one, the authors’ own conclusion, quoted and linked. This page reports that literature. It does not tell you whether to combine them.

Read this first

An evidence index, not guidance.

Every statement below is attributed to a named, dated, linked source.

This page lists published research relevant to Activated Charcoal and Phenytoin. It deliberately does not state whether the combination is safe, whether it interacts, in which direction, at what dose, or how far apart to take them.

The research

7 studies naming Activated Charcoal and Phenytoin.

Strongest relevance first: papers naming both substances in the title, then human trials and systematic reviews.

Activated Charcoal Does Not Reduce Duration of Phenytoin Toxicity in Hospitalized Patients.

American journal of therapeutics · 2016 · PMID 24621645

Observational StudyHuman subjects

“The groups appeared similar with respect to peak phenytoin concentrations and prevalence of signs and symptoms. In this observational series, the use of activated charcoal was associated with increased time to reach the composite end point of clinical improvement.”

Cumpston et al. · From the abstract

Names both Activated Charcoal and Phenytoin in its title.

Use of multiple-dose activated charcoal in phenytoin toxicity.

The Annals of pharmacotherapy · 1994 · PMID 8173135

Case ReportsHuman subjects

“Multiple-dose activated charcoal was used successfully in treating acute phenytoin toxicity in our patient. Based on his previous admission for chronic phenytoin toxicity, his hospital stay was reduced by three days. The use of multiple-dose activated charcoal in acute phenytoin toxicity has potential therapeutic and financial implications.”

Howard et al. · Authors' conclusion

Names both Activated Charcoal and Phenytoin in its title.

Reduction of absorption of digoxin, phenytoin and aspirin by activated charcoal in man.

European journal of clinical pharmacology · 1978 · PMID 668776

Clinical TrialRandomized Controlled Trial

“When activated charcoal was ingested 1 hour after the drugs the inhibition of absorption was considerably less. However, since the absorption of larger doses of the drugs is often slow, the administration of an adequate dose of activated charcoal will be of definite value in the treatment of acute intoxication, even if delayed for several hours.”

Neuvonen et al. · From the abstract

Names both Activated Charcoal and Phenytoin in its title.

The effect of activated charcoal on phenytoin pharmacokinetics.

Annals of emergency medicine · 1990 · PMID 2221521

Human subjects

“Oral activated charcoal was shown to affect phenytoin pharmacokinetic parameters. Further pharmacokinetic/pharmacodynamic studies are warranted to determine if activated charcoal results in a faster recovery from phenytoin toxicity.”

Rowden et al. · Authors' conclusion

Names both Activated Charcoal and Phenytoin in its title.

Enhancement of phenytoin elimination by multiple-dose activated charcoal.

Annals of emergency medicine · 1987 · PMID 3662159

Human subjects

“Multiple-dose activated charcoal is effective in enhancing the elimination of phenytoin in normal volunteers. Although future studies are needed to determine its role in treating patients with phenytoin toxicity, multiple-dose activated charcoal may provide a readily available, inexpensive therapeutic intervention.”

Mauro et al. · From the abstract

Names both Activated Charcoal and Phenytoin in its title.

Antidotes for acute cardenolide (cardiac glycoside) poisoning.

The Cochrane database of systematic reviews · 2006 · PMID 17054261

Systematic ReviewHuman subjects

“There is some evidence to suggest that MDAC and anti-digoxin Fab antitoxin may be effective treatments for yellow oleander poisoning. However, the efficacy and indications of these interventions for the treatment of acute digitalis poisoning is uncertain due to the lack of good quality controlled clinical trials.”

Roberts et al. · Authors' conclusion

Names Activated Charcoal and Phenytoin together in an interaction, co-administration, or pharmacokinetic context.

Limitations

What this evidence cannot tell you.

Search-based evidence indexes have real limits, and it is worth being explicit about them:

NutriStack

Track what you actually take.

NutriStack is a free iPhone app for organising a supplement routine: what you take, when, and what the published record says about it. Its exploratory interaction checker covers Activated Charcoal, Phenytoin, and several hundred other substances.

The checker is a research and organisation tool, not a clinical decision aid, and its per-pair assessments are excluded from search until they pass claim-level review.

NutriStack is an informational and organizational tool, not a medical service, and not a substitute for professional advice. Always consult a qualified healthcare professional before starting, stopping, or changing any supplement or medication.