Is Ketamine Therapy Safe? A Guide for Israel

July 24, 2026

If you are considering ketamine therapy in Israel, safety is almost certainly your first question — and it is the right one to ask. The short answer, supported by decades of clinical use, is that ketamine has a strong safety record when it is properly screened for, correctly dosed, and delivered under medical supervision. Ketamine has been used in medicine since the 1960s and sits on the World Health Organization’s List of Essential Medicines.

But “ketamine” and “ketamine therapy” are not quite the same thing, and the difference matters for safety. At Keter Health in Jerusalem, we don’t simply administer a drug — we practise Ketamine-Assisted Psychotherapy (KAP), a structured treatment in which the medicine sits inside a framework of preparation, medical monitoring, and integration. That framework is not a nicety; it is a large part of what makes treatment safe. This guide explains the real side effects, the honest limits of what’s known, and why the therapy around the medicine is a safety feature in its own right.

Is Ketamine Therapy Safe? The Short Answer

When administered according to best-practice protocols and after proper screening, ketamine is considered very safe. It is sometimes called the “forgiving psychedelic”: there is no record of lasting psychological harm from ketamine given in a controlled, therapeutic setting, and serious adverse events in clinical use are rare.

That safety is conditional, not automatic. It depends on a qualified psychiatrist confirming you are a suitable candidate, on the dose and route being controlled, and on trained professionals monitoring you throughout. Ketamine is a serious medical treatment — which is exactly why it should never be self-administered or sourced outside a clinical setting.

Common Side Effects, and How Long They Last

Most side effects of ketamine therapy are mild, temporary, and expected. During and shortly after a session, people may experience:

Dissociation — a sense of detachment from body or surroundings, which is part of the therapeutic experience rather than a complication.
Dizziness, nausea, or grogginess.
A temporary rise in blood pressure and heart rate.
Perceptual changes — shifts in how sound, time, or space feel.

According to clinical sources, these effects typically resolve within an hour or two of the session as the medicine wears off, which is why monitored recovery time is built into the appointment. This is also why ketamine is administered in a calm, supervised setting and why you should never drive yourself home afterwards.

What About Long-Term Risks?

This is where honesty matters most. The well-documented long-term risks associated with ketamine — bladder problems (cystitis), and possible effects on memory or concentration — are consistently linked to frequent, high-dose, recreational use, not to the low, spaced doses used in supervised therapy.

A 2026 clinical safety review notes that ketamine’s neurological effects appear to depend heavily on dose and treatment frequency: at low doses with appropriate intervals between sessions, the picture is reassuring, whereas risk rises with heavy repeated exposure. Researchers are clear that therapeutic use is relatively new and long-term study continues, so responsible clinics keep dosing conservative and spaced — which is precisely the KAP approach. At Keter Health, our philosophy centres on the minimal effective dose: enough to do the therapeutic work, no more.

Why Ketamine-Assisted Psychotherapy Is Safer Than Ketamine Alone

Here is the point that gets lost in most “is ketamine safe?” articles. The safest way to use ketamine for mental health is not as a stand-alone injection, but as Ketamine-Assisted Psychotherapy — the medicine wrapped in preparation and integration sessions with a trained team. Each stage adds a distinct layer of safety.

Preparation sessions — safety before the medicine. Before you ever receive ketamine, preparation sessions establish trust with your facilitator, review the safety protocol, secure informed consent, and set your intentions for treatment. Psychologically, this means you enter a non-ordinary state of consciousness with the internal resources and support to navigate it — sharply reducing the risk of a frightening or destabilising experience. Medically, this stage is where thorough screening happens, so contraindications are caught before any dose is given.

The dosing session — supervision in real time. During the session itself, you are not left alone with the experience. At Keter Health, ketamine is administered primarily as an intramuscular (IM) injection by a medical professional, with careful monitoring throughout, and a certified facilitator present to provide real-time support and help you work through difficult emotions. Continuous in-person observation and attention to vital signs are exactly the safeguards clinical guidelines call for.

Integration sessions — safety after the medicine. Afterwards, integration therapy helps you make sense of what surfaced and turn it into lasting change. This matters for safety in a subtle but important way: integration keeps the focus on healing and insight rather than on the drug experience itself, which helps guard against the main misuse pattern with ketamine — a desire to return to the altered state for its own sake. Access to the medication is strictly controlled, and the team watches for any signs of dependence.

Put simply: preparation reduces psychological risk going in, monitoring reduces medical risk during, and integration reduces the risk of misuse afterwards. That is the safety case for KAP over a bare infusion.

Who Should Not Have Ketamine Therapy

Part of what makes treatment safe is knowing when not to proceed. Ketamine may be unsafe or inappropriate for people with certain conditions, including:

Uncontrolled high blood pressure or significant cardiovascular disease
A personal or immediate-family history of psychosis or schizophrenia
Current psychosis or active mania
Active, unmanaged substance use disorders
Pregnancy or planned pregnancy

Some conditions are “soft” rule-outs that may be worked around after consultation with your other providers; others are firm. Certain medications — such as benzodiazepines, some ADHD medications, or mood stabilisers like lamotrigine — can also blunt ketamine’s effect and may require a short “day-of” hold. None of this is meant to discourage you; it is the reason candidacy must be decided by a physician who reviews your full history, never by an online checklist. If you want a fuller picture, see our guide on whether you’re a candidate for ketamine therapy in Israel.

How Keter Health Keeps Treatment Safe in Jerusalem

At Keter Health, safety is built into the process from the first conversation:

Step 1 — Comprehensive psychiatric screening. Every client is evaluated by Dr. Isaac Nagel, MD, a board-certified psychiatrist, who reviews your mental-health history, physical health, and current medications before treatment is approved.

Step 2 — A supported, monitored setting. Sessions take place in a calm, private clinic with a medical professional and certified facilitator present — not a walk-in, self-serve model.

Step 3 — Conservative, personalised dosing with preparation and integration around every session, keeping treatment both effective and cautious.

Because ketamine’s psychiatric use in Israel is legal but tightly regulated — administered by licensed professionals under individual authorisation — this screening step is also a legal safeguard, not just a clinical one. You can read more about the legal status of ketamine therapy in Israel.

FAQ

Is ketamine therapy addictive?
Ketamine has low addiction potential when used therapeutically. In KAP, access to the medication is strictly controlled and the team monitors for any behaviours that suggest dependence, actively guarding against it.

Are the side effects of ketamine therapy dangerous?
For carefully screened patients, the common side effects — dissociation, dizziness, nausea, a temporary rise in blood pressure — are mild and typically pass within an hour or two. That is why sessions are medically supervised and include monitored recovery time.

What are the long-term effects of ketamine therapy?
Serious long-term effects such as bladder problems are associated with frequent, high-dose recreational use, not the low, spaced doses used in supervised therapy. Long-term research is ongoing, which is why responsible clinics keep dosing conservative.

Why is ketamine-assisted psychotherapy safer than a plain infusion?
Because the preparation, real-time monitoring, and integration sessions each add a layer of safety — reducing psychological risk before, medical risk during, and misuse risk after treatment.

Do I need medical clearance before starting?
Yes. A full psychiatric and medical screening determines whether ketamine therapy is safe for you, and it is a required step at Keter Health.

Ready to Ask Your Safety Questions?

The best way to understand whether ketamine therapy is safe for you is a professional evaluation where you can raise every concern. If you are in Jerusalem or anywhere in Israel, we’re here to walk you through the process — with no pressure and no obligation.