What to Expect the First Time You Experience Ketamine Therapy

June 26, 2026
Ketamine Therapy

Dr. Elyas Parsa, DO

Learn what to expect the first time you undergo ketamine treatment at Mind Balance Flow's Livermore clinic.

The unknown is uncomfortable. I get it.

When patients come to our Livermore clinic for their first ketamine session, many arrive with a mix of hope and apprehension. They’ve read the research. They’ve heard it might help where other treatments haven’t. But they don’t know what it will actually feel like to sit in that chair and let a dissociative medicine work on their brain.

This post is my attempt to give you a clear picture. Not to sanitize or oversell. Just honest information from someone who has guided hundreds of patients through this experience and witnessed what it can do.

How the Type of Ketamine Affects Your Experience

First, understand that ketamine therapy isn’t one-size-fits-all. The route of administration shapes everything from how quickly you feel effects to how deep the experience goes.

IV (intravenous) infusion delivers ketamine directly into your bloodstream. Onset is rapid, usually within one to two minutes. The experience tends to be more immersive because plasma levels rise quickly and can be precisely controlled by adjusting the drip rate. This is what most people picture when they think of ketamine therapy.

IM (intramuscular) injection involves a shot, typically in the upper arm or thigh. Onset takes five to ten minutes. The experience arc is slightly different, and longer, from IV because absorption happens through muscle tissue rather than directly into circulation. Some patients find IM more accessible since there’s no IV line involved.

Sublingual ketamine involves dissolving a lozenge or tablet under your tongue. This method has lower bioavailability, meaning less ketamine reaches your brain compared to IV or IM at equivalent doses. The experience is often gentler, sometimes described as “softer around the edges.” It’s commonly used for at-home protocols between clinic visits, though some providers use it exclusively.

Oral and intranasal ketamine have the same experience as sublingual ketamine as described above.

At Mind Balance Flow, we primarily use IM and IV administration. Why? Because for treatment-resistant depression, anxiety, PTSD, and chronic pain, we want therapeutic doses that reliably reach the brain. The clinical evidence is strongest for these routes.

What Does Ketamine Therapy Actually Feel Like?

This is the question I hear most. And honestly, it’s hard to answer because the experience is deeply personal. Two patients receiving the same dose in the same room will describe different things.

That said, there are common threads.

Physical sensations: Many people notice a sense of heaviness or lightness in their body within the first few minutes. Some describe feeling like they’re floating. Others feel a gentle pressure, as if wrapped in a weighted blanket. Coordination becomes impaired. If you tried to walk, you’d be unsteady. This is why you stay seated or reclined throughout.

Perceptual shifts: Colors may appear more vivid. Sounds may seem distant or unusually present. Your sense of time often distorts. Fifteen minutes might feel like an hour. An hour might feel like fifteen minutes.

Dissociation: This is ketamine’s signature effect. The medicine partially disconnects your conscious awareness from your body and your usual mental chatter. For some, this feels freeing. For others, especially the first time, it can feel strange or unsettling before it becomes comfortable.

Emotional material: Memories, feelings, or imagery may arise. These aren’t hallucinations in the classic sense. They’re more like vivid internal experiences, similar to a dream state but with awareness that you’re in it. Some sessions are emotionally neutral. Others bring up grief, relief, or unexpected insights. I’ve seen patients cry. I’ve seen them laugh. Both are welcome.

What I tell every first-time patient: you are not in danger. Whatever arises, we’re here with you. The medicine has a predictable duration. It will end, and you will return to baseline.

What Is a Ketamine Infusion Like, Step by Step?

Let me walk you through a typical session at our clinic so there are no surprises.

Before Your Session

We ask that you fast for at least four hours before your appointment. An empty stomach reduces nausea risk and allows better absorption. Wear comfortable clothes. Leave your expectations at the door if you can.

You’ll meet with me or a member of our clinical team to review your medical history, current medications, and intentions for the session. We want to know what you’re hoping to address. Not because ketamine requires a specific goal, but because setting an intention can shape the experience in meaningful ways.

We’ll check your vital signs. If you’re receiving IV ketamine, we’ll start a line in your arm. You’ll settle into a comfortable recliner in a private room. Eye shades and headphones with calming music are optional but many patients find them helpful.

During IV or IM Administration

For IV administration, the infusion typically runs forty to sixty minutes. We start the drip. Within one to three minutes, you’ll begin feeling the effects.

For IM administration, which is the method we most prefer, we administer the IM injection which you will begin to experience in 5-10 minutes.

The peak experience usually occurs between twenty and forty minutes in (shorter for IV, longer for IM). This is when dissociation is strongest and perceptual shifts are most pronounced. Some patients describe this phase as “journeying.” Others simply experience a quiet dissolution of the mental noise that usually dominates their awareness.

Throughout the session, a clinician is present or immediately accessible. We monitor your vital signs and your comfort level. If you need anything, we’re there.

As the medicine begins to clear, the dissociative effects fade gradually over the next fifteen to thirty minutes. Most people describe feeling “soft” or pleasantly tired as they return to ordinary awareness.

The total session lasts about 50 minutes for IV administration, and 1 ½ hours for IM administration. But whether you get IV or IM ketamine, we are there to observe you for 120 to 150 minutes.

After the Session

Plan for about thirty to sixty minutes of recovery time in the clinic. You should not drive for the rest of the day. Arrange a ride home, whether that’s a friend, family member, or rideshare.

The hours after a session are often quiet. Many patients report feeling calm, open, or emotionally tender. Some feel tired and take a nap. Others want to journal or sit with what came up. There’s no wrong way to spend this time, but I encourage patients to avoid screens and stressful conversations if possible.

Mild side effects can include nausea, dizziness, or a headache. These typically resolve within a few hours. We provide anti-nausea medication if needed.

Why Integration Matters More Than the Experience Itself

Here’s something that doesn’t get talked about enough: the ketamine session is only part of the healing.

Ketamine works, in part, by increasing neuroplasticity. It promotes the growth of new synaptic connections, particularly in brain regions involved in mood regulation like the prefrontal cortex. Think of it as temporarily softening the brain’s wiring, making it more receptive to change.

But softened wiring alone doesn’t guarantee transformation. What you do with that window of heightened plasticity matters enormously.

This is where integration comes in.

Integration means actively processing and applying what arose during your session. It might involve journaling, therapy, meditation, or simply paying attention to the shifts in your thinking and behavior over the following days. Some patients notice that old patterns feel less automatic. Negative self-talk might quiet down. A sense of possibility emerges.

We support integration at Mind Balance Flow through follow-up conversations and by connecting patients with therapists who specialize in psychedelic-assisted treatment. The Tri-Valley and broader Bay Area have a growing community of integration-informed practitioners, and we’re happy to provide referrals.

Without integration, ketamine can still provide relief. But with it, the relief is more likely to stick.

What About the “Trip”? Let’s Be Honest

Some people search for “what is a ketamine trip like.” I understand the curiosity.

Yes, ketamine is a psychoactive substance. Yes, at therapeutic doses, it produces an altered state of consciousness. The experience can be profound, strange, beautiful, or uncomfortable. Sometimes all of those in a single session.

But I want to be clear about framing. In a clinical setting, we’re not chasing a “trip” for its own sake. We’re using a medicine with documented effects on glutamate signaling and the default mode network to create conditions where healing can happen.

The goal isn’t to get high. The goal is to get better.

That said, I don’t dismiss the experiential component. For many patients, especially those with trauma or chronic depression, temporarily stepping outside their usual mental prison is itself therapeutic. The perspective shift alone can crack open doors that felt permanently sealed.

Is Ketamine Therapy Right for You?

Ketamine isn’t for everyone. It’s contraindicated in certain conditions, including uncontrolled hypertension, active psychosis, bipolar type 2, and some cardiac issues. We screen carefully before accepting any patient.

But if you’ve tried multiple antidepressants without success, if you’re living with treatment-resistant depression, anxiety, or PTSD, ketamine may offer something different. Not a magic cure, but a chance to break out of a pattern that has felt unbreakable.

If you’re in Livermore, the East Bay or Tri-Valley, or the greater Bay Area and want to explore whether ketamine therapy might help, we offer free consultations at Mind Balance Flow. No pressure, no obligation. Just a conversation about your situation and whether this treatment makes sense for you.

You can schedule online here.