
The Age of Diagnosis
Sickness, Health and Why Medicine Has Gone Too Far
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Narrated by:
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Suzanne O’Sullivan
About this listen
'A brilliant study of the dangers of overdiagnosis' - GUARDIAN, book of the day
'Be prepared for compassionate and bracingly independent thinking' - THE TIMES, best books of 2025
From autism to allergies, ADHD to long Covid, more people are being labelled with medical conditions than ever before. But can a diagnosis do us more harm than good?
The boundaries between sickness and health are being redrawn. Mental health categories are shifting and expanding all the time, radically altering what we consider to be 'normal'. Genetic tests can now detect pathologies decades before people experience symptoms, and sometimes before they're even born. And increased health screening draws more and more people into believing they are unwell.
An accurate diagnosis can bring greater understanding and of course improved treatment. But many diagnoses aren't as definitive as we think. And in some cases they risk turning healthy people into patients. Drawing on the stories of real people, as well as decades of clinical practice and the latest medical research, Dr Suzanne O'Sullivan overturns long held assumptions and reframes how we think about illness and health.©2025 Suzanne O’Sullivan (P)2025 Hodder & Stoughton Limited
What listeners say about The Age of Diagnosis
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- dongoo
- 03-04-25
Essential reading for anyone interested in health
My goodness. This book is an eye opener. It sheds light on so many aspects of our ever increasing diagnostic repertoire but sets out, the subjective and variability of many tests and the largely unconsidered negative consequences. The book explains the many forces, social, medical and vested interests involved in expanding inclusion criteria and how this can dilute the meaning of diagnosis for people with higher needs. The book is powerful and written by a doctor who knows through experience but doesn’t have an axe to grind. It is compassionate and thoughtfully presented. I found the audio a little monotone but overall am very pleased to have listened to it. Like many people I often assume that science is inherently good but the book shows how we have to much more questioning of science than this. Great book. Highly recommended. Thank you.
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- Mrs D
- 01-04-25
Brilliant. A must read.
The modern medical model is making us sick. Diagnosis is replacing personal responsibility & acceptance of a less than optimum state of ‘normal’. Many of us have long suspected this but few have the knowledge and experience of the author to explain how & why this is occurring and what might be done about it.
Change is essential now. The hope is experts like Dr O’Sullivan might drive it forward by raising our awareness of the need for it.
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- Honster
- 18-04-25
This book should be read be every doctor and patient in our health system.
A fantastic book. I am a GP and it eloquently expresses so many of the knotty issues that worry me on a daily basis about how the delivery of healthcare has changed. it should ve required reading for all doctors, all trainee doctors, and patients embarking on a diagnostic journey.
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- s Evans
- 28-03-25
Brilliant
Informed me so much that I take into my place of work. Information and easy to listen to
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- Claire baker
- 29-03-25
Every medical professional should read this book!
I’m a pain nurse specialist and feel we over scan and inject patients. I often have to unpick a lot of negative words that have been told to patients such as your spine is crumbling, your backs knackered, your bones are like an aero chocolate bar. Fear avoidance then sets in which exacerbates the pain.
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- DR T MCBRIDE
- 23-04-25
Better than an MRI Scan
A brilliant listen. I've enjoyed all Dr O’Sullivan's books. As a retired doctor I have valued her wisdom, insights and humanity. I recommend her to younger doctors and medical students.
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- jennifer redferne
- 12-04-25
To diagnose or not
This is a book that clearly verbalises the need for art to balance science in medicine.
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- Lawrence Nixon
- 22-04-25
true to life for sure
Engaging and real. chapter on Huntington's disease outstanding. hope over putting others and ourselves in boxes. recommend
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- Dan Fitzgibbon
- 02-04-25
The Curse of Casandra
Casandra was a Greek goddess who was gifted with foresight but cursed that no one would believe her.
As a Children’s Occupational Therapist with a long career working in children’s disability it is refreshing to feel that my jaundice view on labels and diagnosis is justifiable.
I cannot recommend this book more to any clinician or any specialist who is carrying out assessments, especially those which are largely subjective. And I would suggest the bigger a persons negative response to it, should flag even more the need for self reflection.
I would also recommend it to any parent starting down the road of an assessment process for a child, even more so if they are on a waiting list.
Lastly, we need a forum to change the current paradigm or we will be looking back on this time, like all the other medical dead-ends through history.
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- Anna
- 05-04-25
Kind explanations and questions medicine
Fantastic book, incredibly thought provoking and questions many different diagnosis’s.
As someone with a psychosomatic illness I find it fascinating and mind boggling
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