News Release

Antidepressants prescription associated with a lower risk of testing positive for COVID-19

Peer-Reviewed Publication

King's College London

Press release: Under embargo until Wednesday 21 June 2023, 01.00 BST

New research led by the Institute of Psychiatry, Psychology & Neuroscience (IoPPN) at King’s College London has found that community mental health patients who were prescribed antidepressants were significantly less likely to test positive for COVID-19 when admitted to inpatient care.

The research, published in BMC Medicine, suggests that antidepressants – particularly the most commonly prescribed class called selective serotonin reuptake inhibitors (SSRIs) - may have a preventative role against COVID-19 infection, and could provide a complementary approach to mass vaccination.

Using the Clinical Record Interactive Search (CRIS), a platform that enables researchers to investigate patient records without accessing personal data, researchers analysed the clinical records of 5,664 patients admitted for mental health care at South London and Maudsley NHS Foundation Trust during the first wave of the COVID-19 pandemic (April to December 2020).

All newly admitted patients were mandatorily tested for COVID-19 and throughout their inpatient care. Out of the 5,664 patients202 patients tested positive. Researchers found that positive COVID-19 test results were about half as frequent in patients who recently had antidepressants mentioned on their medical record (90 days prior to admission), when compared to the patients with no such record. Further statistical analysis revealed that a recent prescription of antidepressants.  was associated with an approximately 40 per cent reduction in the likelihood of a positive COVID-19 test and SSRIs was the only class of antidepressants showing this association.

Dr Oleg Glebov, a Lecturer at the Department of Old Age Psychiatry of King’s IoPPN and lead author on the study, said, “Notwithstanding the success of vaccination against COVID-19, it has been of limited benefit to some people, particularly immunocompromised individuals and residents of lower-income economies. Our previous work shows that antidepressants may target the cell biology processes of COVID-19 infection, and the results of this study hint at the potential clinical benefit of this effect. In the longer term, cheap, well-characterised and readily available drugs such as antidepressants may help in curbing the spread of COVID-19. If our findings hold up in further investigation, it may provide some help for those left behind by the currently available strategies for COVID-19 prevention”

Due to the methods used and nature of SSRI treatment regimens, the researchers could not guarantee that all patients with a mention of antidepressants in their clinical records were taking the medication at the time of being tested. However, they believe that the association is strong enough to warrant further investigation in a wider population.

Professor Robert Stewart, Professor of Psychiatric Epidemiology & Clinical Informatics at King’s IoPPN, and Deputy Theme lead for Informatics at the National Institute for Health and Care Research (NIHR) Maudsley Biomedical Research Centre said, “For over 15 years, the CRIS platform has been supporting novel and innovative research, allowing health services to learn from patients’ anonymised records. The findings illustrate the huge potential value of this information, as this is the sort of question that could not have been feasibly investigated in any other way. Furthermore, networks like the HDRUK DATAMIND Hub are bringing together expertise, to ensure that the UK has international leadership in this sort of approach.“

Professor Dag Aarsland, Professor of Old Age Psychiatry, King’s College London, said: “This study provides further arguments that antidepressants have interesting effects beyond depression and anxiety. While the effects on COVID-19 are intriguing, we also plan to explore effects on other indications including brain diseases such as Alzheimer's disease".

This study is supported by funding from the Lewy Body Society, the National Natural Science Fund of China, the National Institute for Health and Care Research (NIHR) Maudsley BRC, the NIHR Applied Research Collaboration (ARC) South London and the DATAMIND UK Health Data Research Hub for Mental Health.

The CRIS platform was developed for use within the National Institute for Health and Care Research Maudsley Biomedical Research Centre (BRC).

Antidepressant drug prescription and incidence of COVID-19 in mental health outpatients: a retrospective cohort study (DOI (Oleg O. Glebov, Christoph Mueller, Robert Stewart, Dag Aarsland, Gayan Perera) was published in BMC  Medicine.


For more information please contact:

Alex Booth, Communications and Engagement Manager, NIHR Maudsley Biomedical Research Centre,

Franca Davenport, Communications and Engagement Manager, NIHR Maudsley Biomedical Research Centre, 


Notes for Editors:

The paper is under strict embargo until Wednesday 21 June 2023  01.00 BST UK time.

The labels have been added to this press release as part of a project run by the Academy of Medical Sciences seeking to improve the communication of evidence. For more information, please see:


About King’s College London and the Institute of Psychiatry, Psychology & Neuroscience     

King's College London is one of the top 35 universities in the world and one of the top 10 in Europe (QS World University Rankings, 2021/22) and among the oldest in England. King's has more than 33,000 students (including more than 12,800 postgraduates) from over 150 countries worldwide, and 8,500 staff. King's has an outstanding reputation for world-class teaching and cutting-edge research.

The Institute of Psychiatry, Psychology & Neuroscience (IoPPN) at King’s is a leading centre for mental health and neuroscience research in Europe. It produces more highly cited outputs (top 1% citations) on      psychiatry and      mental health than any other centre      (SciVal      2021),      and on this metric has risen from 16th (2014) to 4th (2021) in the world for highly cited neuroscience outputs. In the 2021 Research Excellence Framework (REF), 90% of research at the IoPPN was deemed ‘world leading’ or ‘internationally excellent’ (3* and 4*). World-leading research from the IoPPN has made, and continues to make, an impact on how we understand, prevent and treat mental illness, neurological conditions, and other conditions that affect the brain. | Follow @KingsIoPPN  on Twitter, Instagram, Facebook and LinkedIn


The National Institute for Health and Care Research (NIHR)

The mission of the National Institute for Health and Care Research (NIHR) is to improve the health and wealth of the nation through research. We do this by:

  • Funding high quality, timely research that benefits the NHS, public health and social care;
  • Investing in world-class expertise, facilities and a skilled delivery workforce to translate discoveries into improved treatments and services;
  • Partnering with patients, service users, carers and communities, improving the relevance, quality and impact of our research;
  • Attracting, training and supporting the best researchers to tackle complex health and social care challenges;
  • Collaborating with other public funders, charities and industry to help shape a cohesive and globally competitive research system;
  • Funding applied global health research and training to meet the needs of the poorest people in low and middle income countries.

NIHR is funded by the Department of Health and Social Care. Its work in low and middle income countries is principally funded through UK Aid from the UK government.


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