Cited by 168Coffee research and impactsPharmacogenetics and Drug MetabolismPregnancy and Medication Impact

Effect of pregnancy on the pharmacokinetics of caffeine

Knutti, R., Rothweiler, H., Schlatter, Ch.·1981·European Journal of Clinical Pharmacology

Abstract

Individual variation in the half-life of caffeine in the body was measured by HPLC analysis of saliva samples. The mean for adult males and non-pregnant females was 3.4 h (range 2-5 h, n = 25), and 8.3 h (range 3-16 h, n = 57) for pregnant women. After delivery, in most cases the values returned to normal within one month. The individual values could not be correlated with age, weight or consumption of coffee. Women drinking large quantities of coffee should be aware of the side effects of coffee during pregnancy, as they may occur at a lower rate of consumption than in the non-pregnant state.

Integrity signals

Registry

Crossref · 10.1007/bf00637512

Cites

22 of 22 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The half-life of caffeine is on average 8.3 h longer during pregnancy and may be as much as 16 h longer than usual.

    “The half-life of caffeine is on average 8.3 h longer during pregnancy and may be as much as 16 h longer than usual (60, 61).”

    From The Safety of Ingested Caffeine: A Comprehensive Review (2017) · cites this paper as [60]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Knutti, R., Rothweiler, H., & Schlatter, C.
Affiliations
University of Zurich (CH)
Venue
European Journal of Clinical Pharmacology
Published
1981
Volume
21
Issue
2
Pages
121-126
ISSN
  • 0031-6970 (ISSN-L)
  • 1432-1041
OpenAlex
W1992709483
Cited by
168
References
22
Citations by year
2026: 2 · 2025: 7 · 2024: 9 · 2023: 6 · 2022: 4 · 2021: 6 · 2020: 10 · 2019: 3 · 2018: 3 · 2017: 5 · 2016: 2 · 2015: 9 · 2014: 3 · 2013: 7 · 2012: 4
FWCI
5.35
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Clinical Pharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Pregnancy and Medication Impact
Keywords
caffeine, pregnancy, pharmacokinetics, caffeine half-life, saliva, postpartum recovery, coffee consumption, interindividual variability
MeSH terms
Adult, Caffeine, Female, Half-Life, Humans, Kinetics, Male, Pregnancy, Smoking

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