What Happens During a Ketamine Treatment Session?

 What Happens During a Ketamine Treatment Session?

What Happens During a Ketamine Treatment Session?

For many patients, the uncertainty of not knowing what a ketamine treatment session will actually feel like or involve is one of the biggest sources of anxiety before starting therapy. While specifics vary between clinics and depending on whether a patient is receiving IV ketamine, intramuscular ketamine, or esketamine nasal spray, most sessions follow a broadly similar structure. This article walks through what patients can typically expect, step by step.

## Before the Session: Screening and Preparation

Before ever receiving a first dose, a legitimate ketamine or esketamine provider will typically conduct a thorough evaluation, including a detailed psychiatric and medical history, review of prior treatments, current medications, and screening for conditions that might make ketamine inappropriate or require extra caution — such as uncontrolled high blood pressure, certain heart conditions, a history of psychosis, or substance use disorders. This process is covered in more depth in a later article in this series on eligibility.

On the day of treatment, patients are generally asked to avoid eating a full meal for a period beforehand (similar to preparation for a minor procedure, given the small risk of nausea), and to arrange transportation home, since driving is not permitted afterward. Patients are also typically asked about their current physical and emotional state before each session, since factors like acute intoxication, significant uncontrolled anxiety, or unstable vital signs may lead a provider to postpone a session.

Arrival and Baseline Monitoring

Upon arrival, most clinics will check baseline vital signs — blood pressure, heart rate, and oxygen saturation — since ketamine can cause transient increases in blood pressure and heart rate, and providers want a clear baseline for comparison during the session. Many clinics also use this time to briefly check in on the patient’s current mood, any recent changes in symptoms, and any concerns since the last visit.

The Setting

Ketamine treatment sessions are typically conducted in a quiet, private, comfortable room, often a reclining chair or treatment bed, with dim lighting. Many clinics allow or encourage patients to bring headphones and listen to calming music, and some provide eye masks or eye shades, since minimizing external sensory stimulation is generally thought to support a more comfortable experience during the dissociative effects of the medication. A clinician or trained staff member is typically present in the room or immediately available throughout the session, along with monitoring equipment tracking vital signs.

Administration

**IV infusion.** For intravenous ketamine, a small IV line is placed, typically in the arm, and the medication is infused slowly over a set period — commonly around 40 minutes for standard depression protocols, though pain management infusions may run longer. The slow infusion rate is intentional, allowing for a controlled, gradual onset of effects and giving the clinical team the ability to adjust or stop the infusion if needed.

**Intramuscular injection.** Some clinics use intramuscular ketamine instead of or alongside IV administration, delivered as a single injection, typically into the upper arm or thigh, with effects setting in somewhat faster than IV infusion but following a less easily controlled dosing curve during the session itself.

**Esketamine nasal spray.** For esketamine (Spravato), the patient self-administers the nasal spray device themselves, under direct observation by clinical staff, following specific device instructions (including a required waiting period between sprays if more than one device is used for the prescribed dose).

During the Session: What Patients Typically Experience

Once the medication takes effect, most patients experience some degree of dissociation — a sense of detachment from their body, altered perception of time, or a dreamlike quality to their surroundings and thoughts. Some patients describe visual changes, such as colors or shapes appearing more vivid or shifting, while others describe primarily an internal, introspective experience with fewer visual changes. The intensity and character of this experience varies considerably between individuals and even between sessions for the same person.

Physically, patients may notice mild increases in heart rate or blood pressure (monitored by clinical staff throughout), along with sensations like mild dizziness, lightheadedness, or a floating feeling. Nausea is possible, and some clinics offer anti-nausea medication proactively or as needed. Speech and coordination may be temporarily affected, which is part of why patients remain seated or reclined throughout the session and are not left unsupervised.

Emotionally, some patients report the experience as calming or even mildly euphoric, while others find it strange, unsettling, or occasionally, for a portion of patients, more distressing — which is one reason clinical staff typically check in periodically during the session, and why patients are encouraged to communicate openly about their experience so the team can offer reassurance or, if needed, adjust the treatment plan for future sessions.

After the Session: Recovery and Monitoring

Once the infusion or dosing period ends, patients generally remain in the clinic for an observation period — a minimum of two hours for esketamine specifically, per its FDA-approved protocol, and generally a similar period for IV or intramuscular ketamine at most reputable clinics — while the acute effects wear off and vital signs are confirmed to be stable. During this recovery window, most patients gradually regain full clarity, coordination, and a normal sense of their surroundings, though some grogginess or mild fatigue may persist for the rest of the day.

Clinical staff will typically check vital signs again before discharge and confirm that the patient has a safe way to get home, since driving or operating machinery is not permitted for the remainder of the day following treatment.

What Happens in the Days Following

Many providers ask patients to track their mood, symptoms, or pain levels over the days following a session, both to monitor for improvement and to watch for any concerning changes. Some clinics schedule brief follow-up check-ins by phone or message between in-person sessions, particularly during the initial, more frequent phase of treatment. As discussed in more detail in the article on combining ketamine with psychotherapy elsewhere in this series, some treatment programs also incorporate structured therapy sessions in the days surrounding ketamine treatment, based on the theory that this window may be a particularly valuable time for therapeutic work.

Variability Between Clinics

It’s worth being clear that specific practices — the exact monitoring protocols, the environment, whether music or other sensory supports are offered, how check-ins are structured, and how closely sessions are integrated with psychotherapy — vary considerably between providers. This is part of why researching and choosing a qualified, experienced clinic matters so much, a topic explored in detail in a later article in this series. Patients considering treatment should feel comfortable asking a prospective provider to walk through exactly what a session will look like at their specific facility before committing to a treatment plan.

The Bottom Line

A typical ketamine treatment session involves a structured sequence: pre-session screening and vital sign checks, administration of the medication in a calm, monitored setting, a period of altered perception and dissociation lasting roughly thirty to sixty minutes, a recovery and observation period of at least two hours, and specific after-care instructions including no driving for the remainder of the day. While individual experiences vary and specific clinic practices differ, this general structure reflects the emphasis that legitimate, reputable ketamine providers place on safety, monitoring, and patient comfort throughout the treatment process.

*This article is for educational purposes only and does not constitute medical advice. Specific treatment protocols vary by provider and should be discussed directly with a licensed healthcare provider before starting treatment.*