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The D4 Clinic

The D4 Clinic

(01) 907 9538

58 Newtownpark Ave, Blackrock, Dublin, A94P407Ireland

Very Good
from 95 users
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Opening hours

Monday09:30 - 20:00
Tuesday09:30 - 20:00
Wednesday09:30 - 20:00
Thursday09:30 - 20:00
Friday09:30 - 20:00
Saturday09:30 - 18:00
Prices from €149 - Enquire for a fast quote ★ Very Good ServiceScore™ 7.4 from 95 votes ★ 4 verified patient reviews. Visit our Holistic Health Clinic - 58 Newtownpark Ave, Blackrock, Dublin, A94P407, Ireland.

Popular Treatments

Hypnotherapy from €149
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About The D4 Clinic

Ireland's most successful Hypnotherapy, Weight loss and Stop Smoking Clinic.

The only clinic with Masters trained Trinity gradate psychologists

What Clinic Award Winner 

Weight Loss Hypnotherapy

Stop Smoking for Life Now for Only €397 with free follow up sessions for life and free recording of your sessions. With €50 refund if you provide a video testimonial after being a month smoke free.

With Trinity College Trained Psychologist/Clinical Hypnotherapist

Free follow up treatment for life for all smokers

Free recording of your session for home use

Weight Loss Hypnotherapy/Gastric Band Hypnotherapy Now Only  €447. 

NOW €150 off if you pre book online. So that's only €299 for Unlimited sessions (providing you lose 7lbs in between sessions)

If you lose 3 stone or more and allow us to share before and after photos on our social media/website we refund you fee in total

Suitable, for those who wish to lose a minimum of 2 stone. Call us now for more details

We also do one general hypnotherapy sessions, online sessions and in clinic

 This is suitable for anxiety, depression, stress, phobias, confidence, public speaking, IBS, blushing, study help, fear of flying, alcohol reduction, relationship issues plus many more day to day issues

The Dublin 4 Clinic (Blackrock) Dublin Most Trusted Hypnotherapy Clinic. 

Using Dublin's Best Trained Trinity College Qualified Therapists. The D4 Clinic  is also the only Hypnotherapy Clinic in Ireland that offers a lifetime guarantee on all stop smoking programs, we have featured on all major radio and TV shows in Ireland and are the only clinic in Ireland to use professional Trinity College qualified Masters level psychologists as therapists.

The Dublin 4 clinic can help you to lose weight, stop smoking, reduce stress and anxiety, eliminate phobias, increase confidence, overcome stage fright, lose the fear of public speaking plus many more day to day issues using clinical hypnotherapy, psychology, CBT and counselling.

Please email or call right now to arrange a hypnosis consultation free over the phone to see if The D4 Clinic can help you today.

What is hypnotherapy?

Hypnosis is a heightened state of awareness. It is simply a state of mind, which is best used for suggestion implantation, in order to bring about desired change, such as Weight Loss, Smoking Cessation and Fear/Phobia elimination to name but some of the common ailments cured, using the power of Hypnosis. It involves complete mental and physical relaxation. Clients are totally awake and aware during a hypnosis session. Clinical hypnotherapy is not used in the same way as stage hypnosis.

Online Clinical Hypnotherapy
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Patient reviews

4.9 from 4 verified reviews
Sharon, Ireland
( Review verified by phone and email)

it changed my whole outlook on food and portion sizes

5 50 Hypnotherapy • Paid: €299

I done the gastric band hypnosis with the D4Clinic and have lost 3 stone it was the best thing I done I tried so many different diets but all only worked for a few weeks my head just wasn't in the zone but Jason wasn't long in putting my head in the zone it changed my whole outlook on food and portion sizes I have much more confidence in myself and it's a pleasure buying new clothes

The D4 Clinic is such a nice place to go to you are made to feel very relaxed and you don't feel stupid asking questions in any queries you have it's very easy to get to and easy to find

Treated by: Mr Jason O'Callaghan
Anonymous, Ireland
(We were unable to verify the reviewer)

Excellent experience

Virtual Gastric Band Hypnosis

I got the gastric band hypnosis and it's the best thing I done iv tried so many different diets and they only worked for a few weeks my head just wasn't in the zone Jason put my head in that zone and iv never looked back iv a new way of looking at food and portion sizes I highly recommend it to anyone who is looking to loose weight sensibly

The clinic is so relaxing and your made to feel very much at ease your not afraid or feel stupid asking questions it's the D4 Clinic all the way very easy to get to and easy to find

Treated by: Mr Jason O'Callaghan
J., Ireland
( Verified user. Review confirmed by email)

Very pleased

5 50 Hypnotherapy • Paid: €75

Yes. Very pleased with treatment and results. I broke a CD I was given and Jason posted a replacement immediately.

Treated by: Mr Jason O'Callaghan
Carina, Ireland
( Review verified by email)

Was impressed

4.5 50 Stop Smoking - Alternative Treatment • Paid: €149

Attended this clinic recently and was impressed with the service, the offices and the staff. Saw a qualified psychologist who trained as a hypnotherapist. Did a stop smoking session and got a deal of €149 reduced from €249. Which was good. Never smoked again and was impressed cause they said if I slipped up I could go back for a free session anytime to help me stay off them. Still off them, so worked for me.

Angie, Ireland
( Verified user. Review confirmed by phone)

I would recommend this clinic to anyone

5 50 Hypnotherapy • Paid: €75

This is an excellent service. The price was very good and the process was clearly explained to me before we started. The therapy was very effective and I was given a recording of my session so I could support my session until my next session.
I also received a great book written by Jason that advises and guides through healthy change of your life.
I would recommend this clinic to anyone who needs to balance out a stressful life quickly and effectively.

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  • PSI - Psychological Society of Ireland (Ireland) 


Parking - On Street parking (metered)Accessible to disabled peoplePublic transport access - DART to BlackrockWheelchair accessible toiletAccess without stepsDisabled parkingPatient bathroomWireless access

Clinic services

Emergency serviceText message remindersOpen weekends

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Holistic Health

from €149


The D4 Clinic - The D4 Weight Loss and Stop Smoking Clinic

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Mr Jason O'Callaghan

Job Title:
  Hypnotherapy, Psychology

Jason OCallaghan holds a Masters Degree in Appied Psychology from Trinity College, an honours degree in Psychology, plus qualifications in CBT, Hypnotherapy and Counseling. He trained for four years before opening The D4 Clinic and has gained work experience in AMNCH, Tallaght Hospital, The Samartians, ARC Cancer Support Center plus carried out research into hypnotherapy and humour therapy stress reduction for cancer patients.

(01) 907 9538

58 Newtownpark Ave, Blackrock, Dublin, A94P407Ireland