Ketamine Therapy Dosage Guide

You've done the research. You know ketamine therapy might finally help your treatment-resistant depression when nothing else has. But now you're trying to figure out the practical details: How much ketamine will you actually receive? Is there a standard dose, or does it vary? What's the difference between IV infusions and at-home options?

The numbers can feel overwhelming: milligrams, kilograms, bioavailability percentages. And if you've read anything about ketamine outside medical contexts, you might worry about getting the dose wrong.

Here's what's reassuring: you don't calculate your own dose. Your clinician handles this based on established protocols and your individual response.

Your clinician determines your dose based on your body, your medical history, and how you respond to treatment. For treatment-resistant depression, IV protocols typically use 0.5 mg/kg while at-home sublingual programs use higher doses (adjusted for absorption differences). Either way, your care team calibrates and adjusts based on what works for you.

How Does Ketamine Dosing Work?

The doses used for depression are much lower than surgical anesthesia (roughly one-quarter the amount). This produces rapid antidepressant effects while you remain awake and alert. Clinical trials report significant symptom reduction from this carefully calibrated range.

Different delivery methods require different doses because of how ketamine works in your body:

• IV ketamine at 0.5 mg/kg infused over 40 minutes represents the gold standard with the most clinical evidence. Intravenous delivery achieves 100% bioavailability, meaning all the medication reaches your bloodstream.
  
• Intranasal esketamine (Spravato) uses fixed doses of 56 mg or 84 mg regardless of body weight. It's the only FDA-approved ketamine-derived treatment for mental health conditions.
  
• Sublingual and oral ketamine, used off-label for depression, require higher doses to achieve equivalent blood levels. Sublingual ketamine achieves roughly 30% bioavailability, while oral (swallowed) is lower at approximately 20%. A 35 mg IV dose equals approximately 121 mg sublingual or 175 mg oral. At-home programs typically start at 100–400 mg, with clinicians adjusting up to 400–600 mg based on your response.

How Do Providers Determine Your Ketamine Therapy Dose?

Your dose isn't one-size-fits-all. Your clinician follows a structured process to find what works for you.

Stage 1: Medical screening. Your clinician evaluates whether treatment is safe for you, ruling out conditions that make ketamine inappropriate. This includes reviewing your cardiovascular health, mental health history, current medications, and any history of substance use.

Stage 2: Initial dosing. For IV ketamine, your weight determines the starting dose. A 70 kg (154 lb) person receives about 35 mg infused over 40 minutes. For esketamine, treatment starts at 56 mg and may increase to 84 mg. At-home sublingual programs typically begin with 100–400 mg.

Stage 3: Dose adjustment. Your clinician assesses your response at 4 weeks to guide ongoing treatment. They're looking at both symptom improvement and how well you tolerated each session. If you experienced significant relief but had challenging side effects, they might adjust the dose or timing. If the initial dose didn't produce much change, they may increase it within safe parameters. This iterative process is why clinical oversight matters. Your care team fine-tunes treatment based on your actual experience, not a formula.

Stage 4: Maintenance. Most people who respond need ongoing sessions to sustain benefits. Frequency varies based on your response and the administration method.

What Do Treatment Sessions Feel Like?

The most common side effects of ketamine therapy include headache, dizziness, nausea, dissociation, and drowsiness. These effects typically resolve within 30–45 minutes after treatment ends.

Dissociative effects peak around 40 minutes after administration. You may feel detached from your body, experience time differently, or have unusual perceptual experiences. These sensations become less pronounced with repeated treatments. Research suggests dissociation may actually be connected to therapeutic effectiveness rather than being merely unwanted.

Many people find it helpful to prepare their space beforehand: comfortable seating, dim lighting, a playlist, or an eye mask if you prefer minimal stimulation. Some describe the experience as dreamlike. Thoughts feel looser, more associative. Others feel deeply relaxed. Your clinician will discuss what to expect before your first session and check in with you throughout.

Sessions typically take about 2 hours. You won't be able to drive until the following day due to lingering effects on perception and coordination.

What Does Improvement Actually Look Like?

Clinical trials measure symptom reduction on standardized scales. But what does that actually feel like?

People often describe it as the volume turning down. The constant background noise of dread or emptiness doesn't vanish entirely, but it quiets enough to function. You might notice you can get out of bed without the usual negotiation. Conversations feel less exhausting. Small tasks like showering or making breakfast stop feeling like impossible obstacles.

Some people describe a lifting sensation. Not euphoria, but a lightness where heaviness used to be. Others notice they can access memories and emotions without being overwhelmed. The critical inner voice that narrates everything you do wrong might still be there, but it's quieter.

One distinguishing feature of ketamine is speed. Many people notice subtle shifts even during or immediately after their first session: a curiosity about the future, a flicker of motivation, or simply feeling present in the moment. You're not waiting weeks to know if treatment is working.

What Are the Risks?

With proper clinical monitoring, serious adverse events are rare. The standard 0.5 mg/kg IV dose represents the optimal balance between effectiveness and tolerability.

Cardiovascular effects require monitoring. Blood pressure may increase during treatment and persist for up to 4 hours. You cannot receive ketamine if your blood pressure exceeds 140/90 mm Hg.

Certain conditions exclude you from treatment: uncontrolled hypertension, severe heart conditions, uncontrolled seizures, severe liver disease, a history of psychosis, active substance use disorder, or pregnancy.

Long-term considerations include potential bladder problems and cognitive changes that require ongoing assessment. Contact your clinical team immediately if you experience new or worsening thoughts of suicide, severe agitation, or significant behavioral changes.

Why Does the Therapeutic Approach Matter?

Evidence supports combining ketamine therapy with psychotherapy for better outcomes. The medication opens a door; therapy helps you walk through it.

Ketamine creates a window of neuroplasticity—a period when your brain is more capable of forming new patterns. But that window is most valuable when you have therapeutic support to use it intentionally. Integration sessions help you process what comes up during treatment and translate insights into lasting behavioral changes. Without therapeutic support, effects don't last as long.

Integration might mean processing a memory that surfaced during treatment, noticing shifts in how you relate to difficult emotions, or identifying patterns you want to change. Your therapist helps you make sense of these experiences and connect them to your goals for treatment.

This is why choosing the right provider matters. Some services deliver ketamine with minimal oversight. Others build therapeutic support into every step.

What Does Treatment Look Like with Innerwell?

At this point, you're probably wondering what at-home ketamine therapy actually looks like in practice—and whether it can match the effectiveness of IV treatment.

Innerwell offers at-home sublingual ketamine therapy with licensed psychiatric oversight throughout your treatment. This isn't ketamine dropped off with minimal supervision. It's a comprehensive program built around the idea that the therapeutic relationship matters as much as the medicine.

Innerwell is different in a few key ways:

• Licensed psychiatric providers. Comprehensive care is provided by licensed clinicians at Master's and Doctoral level throughout your treatment. They're trained professionals who monitor your progress, adjust dosing, and provide integrated mental health care.
• Personalized dosing. Treatment begins with two dose-finding sessions to determine your individual sensitivity. Your clinician personalizes your dose based on your body weight, mental health history, and how you've responded to previous sessions, with therapeutic doses typically reaching 400–600 mg for most people.
• Therapeutic support built in. The program combines medication with preparation and integration support. Integration helps you build new patterns during the period of increased flexibility that ketamine creates.
• Insurance partnerships. Insurance partnerships bring costs as low as $54 per treatment, making comprehensive psychiatric care accessible.

Clinical outcomes demonstrate strong effectiveness: 69% reduction in depression symptoms after 10 weeks, 60% reduction in anxiety symptoms after 10 weeks, and 87% of people in the program see improvement within 4 weeks, with a 4.7 out of 5 star average patient rating.

The at-home format addresses a real barrier to treatment. Research shows oral ketamine had lower dropout rates (26.7%) compared to IV (54.8%). The most effective treatment is one you can actually complete.

Take our free assessment to see if ketamine therapy might be right for you.

Frequently Asked Questions

How long does each ketamine session last?

Acute psychological effects typically last 30–45 minutes after administration. Complete sessions require approximately 2 hours, including preparation and monitored recovery. Plan for no driving or operating machinery until the following day.

How many sessions will I need?

Initial treatment typically involves 6–8 sessions over 2–4 weeks. Most people who respond need ongoing maintenance sessions. Your clinician evaluates effectiveness at 4 weeks to determine the path forward.

Is IV ketamine more effective than sublingual?

IV ketamine shows strong response rates in clinical trials. However, a 2024 randomized trial found no significant difference between oral and IV ketamine, with oral showing lower dropout rates. The choice involves balancing clinical evidence, convenience, and what you can realistically maintain.

What does dissociation feel like during treatment?

Most people describe it as feeling detached from your body or surroundings, like watching yourself from a distance. Effects are temporary, typically resolving within an hour, and decrease with repeated treatments. Learn more about what ketamine feels like.

Will insurance cover ketamine therapy?

FDA-approved esketamine (Spravato) may have insurance coverage for documented treatment-resistant depression. Off-label IV ketamine typically isn't covered. At-home programs like Innerwell work with insurance partnerships in California and New York. HSA and FSA accounts may provide reimbursement with proper documentation.