Welcome to The D4

Hypnotherapy Clinic Dublin

Home to Ireland’s highest trained Clinical Hypnotherapists


The only Hypnotherapy Clinic in Ireland with professional Masters trained Trinity College Graduate Psychologists.

Member of The Psychological Society of Ireland (PSI)



We offer hypnotherapy and psychological services 

We offer Stop Smoking hypnotherapy

Weight Loss therapy

Stress & Anxiety therapy

Plus therapy to improve sleep, overcoming phobias/fears, confidence building, reduce bad habits such as alcohol/sugar intake. Overcome a fear of public speaking.

Plus many more day to day issues. 

Call us right now on 01 6688217 to see if we can help you improve your life


for a free phone consultation with a trained psychologist

Call 01 6688217



Hypnotherapy Dublin

Founder of The Dublin 4 Clinic Weight Loss program has personally lost over 4 stone using this method of hypnotherapy & hypnosis

For a Free Phone Consultation call our therapist direct line on. Results may vary per person.

086 7834952

Here is Jason O’Callaghan talking about Hypnotherapy on TV3

Hypnosis Dublin on newstalk

Listen to The D4 Clinic on Newstalk with Sean Moncrieff. Forward to Minute 35 to hear about hypnosis and the mind

Click to play Newstalk listen to what Jason from Hypnosis Dublin has to say.

Watch Jason O’Callaghan of The D4 Clinic interviewed on TV3’s ‘The Morning Show’

* Disclaimer: Willpower may be required and individual results may vary.

Recent News

Corporate Wellness Center The Dublin 4 Clinic (Blackrock) The Dublin 4 Clinic works both in and out ...
Background Morbid obesity is the fastest growing BMI group in the U.S. and the prevalence of morbid ...
  Objectives Various genetic polymorphisms have been reported to be associated with antipsychot...
This case study describes the use of hypnosis in the treatment of post-traumatic stress disorder, re...