Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 702

The DOI matches its Crossref record.

Codeine Intoxication Associated with Ultrarapid CYP2D6 Metabolism

Open access
Gasche, Yvan, Daali, Youssef, Fathi, Marc, Chiappe, Alberto, Cottini, Silvia, Dayer, Pierre, Desmeules, Jules·2004·New England Journal of Medicine

Abstract

Life-threatening opioid intoxication developed in a patient after he was given small doses of codeine for the treatment of a cough associated with bilateral pneumonia. Codeine is bioactivated by CYP2D6 into morphine, which then undergoes further glucuronidation. CYP2D6 genotyping showed that the patient had three or more functional alleles, a finding consistent with ultrarapid metabolism of codeine. We attribute the toxicity to this genotype, in combination with inhibition of CYP3A4 activity by other medications and a transient reduction in renal function.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1056/nejmoa041888

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 702

Metadata

Authors
Gasche, Y., Daali, Y., Fathi, M., Chiappe, A., Cottini, S., Dayer, P., & Desmeules, J.
Venue
New England Journal of Medicine
Published
2004-12-30
Volume
351
Issue
27
Pages
2827-2831
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W1989956851
Cited by
702
References
0
FWCI
17.82
Type
journal article
Language
en
Open access
bronze

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Codeine Intoxication Associated with Ultrarapid CYP2D6 Metabolism. https://app.cochat.ai/papers/10.1056/nejmoa041888
The paper
Gasche, Y., Daali, Y., Fathi, M., Chiappe, A., Cottini, S., Dayer, P., & Desmeules, J. (2004). Codeine Intoxication Associated with Ultrarapid CYP2D6 Metabolism. New England Journal of Medicine. https://doi.org/10.1056/nejmoa041888

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.