Evidence map›Paper›PMID 27354906›Full record

ArticleTherapeutic advances in psychopharmacology2016

Clozapine-induced hypersalivation: an estimate of prevalence, severity and impact on quality of life.

Senan Maher, Aoife Cunningham, Niamh O'Callaghan, Fintan Byrne, Colm Mc Donald, Shane McInerney, Brian Hallahan

Registry-linked trialOpen access · bronzeAbstract read
In one paragraph

Article in Therapeutic advances in psychopharmacology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04197037 (Prevalence Study of Sialorrhea in Inpatients and Outpatients Treated With Clozapine), which is not on this map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 pooled it
4.0field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT04197037 completednot on this mapstarted 2018, after this paper: background citation

Prevalence Study of Sialorrhea in Inpatients and Outpatients Treated With Clozapine

TypeobservationalSponsorParc de Salut MarRan2018 to 2021Enrolled129ConditionsSialorrhea, Clozapine Adverse Reaction, Quality of LifeArmsEvaluation of sialorrhea through questionnaires that measure daytime and nighttime sialorrhea and the impact on quality of life.
3 · Its place in the literature

Who cites it

28 citing papers in PubMed, 2 syntheses or guidelines pooled it, 61 citations in OpenAlex.

  1. Guideline
  2. Pooled it
  3. Article
  4. Article
  5. Oral Health in Individuals with Severe Mental Illness on Second-Generation Antipsychotics-A Scoping Review.Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology · 2025
    Article
  6. The mechanism of action of clozapine.Journal of psychopharmacology (Oxford, England) · 2025
    Article
  7. Article
  8. Off-label Prescribing of Clozapine and Safety.Turk psikiyatri dergisi = Turkish journal of psychiatry · 2025
    Review
  9. Article
  10. Article
  11. [Safety aspects during treatment with clozapine: : Adverse effects, titration, and therapeutic drug monitoring - a narrative review].Neuropsychiatrie : Klinik, Diagnostik, Therapie und Rehabilitation : Organ der Gesellschaft Osterreichischer Nervenarzte und Psychiater · 2023
    Review
  12. Article
  13. Article
  14. Review
  15. Review
  16. Article
  17. The impact of COVID-19 on a cohort of patients treated with clozapine.Irish journal of psychological medicine · 2021
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

Senan MaherNational University of Ireland Galway, Clinical Sciences Institute, Galway, Ireland.
Aoife CunninghamNational University of Ireland Galway, Ireland.
Niamh O'CallaghanNational University of Ireland Galway, Ireland.
Fintan ByrneNational University of Ireland Galway, Ireland.
Colm Mc DonaldNational University of Ireland Galway, Ireland.
Shane McInerneyNational University of Ireland Galway, Ireland.
Brian HallahanNational University of Ireland Galway, Ireland.
Ollscoil na Gaillimhe – University of Galway · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe objective of this study was to evaluate the prevalence and severity of clozapine-induced hypersalivation, and assess the impact hypersalivation has on global functioning.

methodsParticipants attending a dedicated clozapine clinic were invited to undertake a structured interview regarding their experiences of clozapine-induced hypersalivation. Two psychometric instruments to measure hypersalivation, the Nocturnal Hypersalivation Rating Scale and the Drooling Severity and Frequency Scale were used.

resultsClozapine-induced hypersalivation was experienced by 92% of participants, with nocturnal hypersalivation more prevalent compared to daytime hypersalivation (85% versus 48%). Daytime drooling was severe in 18% of cases and was present on a frequent or constant basis for 20% of individuals. Hypersalivation had at least a moderate impact on the quality of life of 15% of study participants.

conclusionsClozapine-induced hypersalivation is the most prevalent adverse effect experienced by patients treated with clozapine and negatively impacts on quality of life, particularly if daytime drooling is present. The development of further strategies to ameliorate this adverse effect is required given the demonstrated lack of success to date in managing this condition.

Indexed as

clozapinedroolingfrequencyhypersalivationincidencelife schizophreniaprevalencequalityseveritysialorrheasialorrhoea

Identifiers

PMID27354906
PMCPMC4910403
OpenAlexW2328751149

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.