Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 245

The DOI matches its Crossref record.

The Comparative Antidepressant Value of L-Tryptophan and Imipramine With and Without Attempted Potentiation by Liothyronine

Coppen, Alec·1972·Archives of General Psychiatry

Abstract

In a trial lasting four weeks patients responded equally well to imipramine (150 mg daily) or to L-tryptophan (9 gm daily). Patients who received a small dose of L-triiodothyronine (T3, liothyronine sodium (25μg daily for the first two weeks of treatment) in addition to imipramine showed a significantly better therapeutic response than patients who received either imipramine or tryptophan alone. Liothyronine did not enhance the therapeutic response to L-tryptophan. None of the treatments tested seemed to benefit any particular symptom of depression differenntially. In particular, L-tryptophan had no specific effect on the sleep deficit of the syndrome. Liothyronine appeared to diminish the side effects of both imipramine and L-tryptophan in both men and women.

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 · 10.1001/archpsyc.1972.01750210042009

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

Metadata

Authors
Coppen, A.
Venue
Archives of General Psychiatry
Published
1972-03-01
Volume
26
Issue
3
Pages
234
ISSN
0003-990X (ISSN-L)
OpenAlex
W2036072463
Cited by
245
References
0
FWCI
22.66
Type
journal article
Language
en
Open access
closed

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: The Comparative Antidepressant Value of L-Tryptophan and Imipramine With and Without Attempted Potentiation by Liothyronine. https://app.cochat.ai/papers/10.1001/archpsyc.1972.01750210042009
The paper
Coppen, A. (1972). The Comparative Antidepressant Value of L-Tryptophan and Imipramine With and Without Attempted Potentiation by Liothyronine. Archives of General Psychiatry. https://doi.org/10.1001/archpsyc.1972.01750210042009

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.