ISTDP psychotherapy · Addiction therapy · Somatic Experiencing
Change begins with understanding what is really going on inside you.
My name is Mariusz Smulewicz. I am a clinical psychologist and psychotherapist. I help people struggling with addiction, partners of people with addiction, and couples in crisis after infidelity. In my work I combine ISTDP psychotherapy, addiction therapy and body-based work. I run the Kalejdoskop Zmian Psychotherapy Centre in Warsaw.
Sessions are currently held in Polish. Sessions in English are coming soon. Feel free to get in touch in the meantime.

You can come to me when:
- you are losing control over drinking, substances, gambling, gaming, your phone or sex,
- you live with someone who has an addiction and feel you are losing yourself,
- your relationship is in crisis after infidelity,
- anxiety, tension or physical symptoms won’t go away despite your efforts.
How I help
Four areas I work with most often
01
Addiction
Alcohol, drugs and prescription medication, as well as behavioural addictions: gambling and stock trading, video games, phone use, compulsive sexual behaviour, shopping, work or exercise. I help you stop the compulsion and understand what purpose it has served in your life.
02
Partners of people with addiction
Living alongside someone with an addiction is exhausting: constant vigilance, control, shame and guilt. I help you reclaim your own boundaries, emotions and decisions, whether or not your partner seeks treatment.
03
Couples in crisis after infidelity
Infidelity shatters trust and the sense of safety for both partners. I help you get through the most acute stage of the crisis, understand what happened, and make a conscious decision about the future of your relationship.
04
Anxiety, trauma and physical symptoms
When emotions take over, or show up in your body as tension, pain or sleeplessness. Here I work with ISTDP psychotherapy and Somatic Experiencing.
How I work
Three approaches, one principle: first, do no harm
ISTDP psychotherapy
Intensive Short-Term Dynamic Psychotherapy. It helps you reach the emotions we defend against, and the mechanisms that keep anxiety, symptoms and recurring relationship problems going.
Addiction therapy
Practical work on stopping the compulsion, recognising how the addiction operates, and preventing relapse. I draw on motivational interviewing and cognitive-behavioural techniques, among others.
Somatic Experiencing
Work with the nervous system and the body’s reactions. It helps release, gradually and at your own pace, the tension left behind by difficult and traumatic experiences.
The first step is the hardest. You don’t need to have the answers.
We start with a 50-minute consultation. You tell me what brings you, and I tell you honestly whether and how I can help. If I think someone else would help you better, I will point you to them.