How Long Does a Ketamine Therapy Session Last?

The Short Answer — and Why It Depends

One of the most practical questions people ask before starting ketamine therapy is how much time each session will take. The answer depends primarily on the route of administration — IV infusion, Spravato nasal spray, or sublingual (oral) ketamine — as well as whether you are including preparation, recovery, and travel time.

Here is a straightforward breakdown of what to expect for each type of session, so you can plan your schedule and your life around treatment.

IV Ketamine Infusion

The Infusion Itself

An IV ketamine infusion for depression or other mental health conditions typically lasts about 40 minutes. Some providers run infusions slightly longer — up to 60 minutes — depending on the protocol and dosing. For chronic pain, infusions may last significantly longer, sometimes two to four hours.

Pre-Infusion Preparation

Plan to arrive 15 to 30 minutes early, especially for your first visit. During this time, the staff will:

• Check your vital signs (blood pressure, heart rate, oxygen levels)
• Place your IV catheter
• Help you get settled in the treatment chair or room
• Review any questions or concerns
• Provide an eye mask, headphones, or blankets if available

Post-Infusion Recovery

After the infusion ends, you will need 30 to 60 minutes for the effects to wear off. During this recovery period, you may feel drowsy, slightly dizzy, or mentally foggy. The staff will monitor you until you are stable enough to leave with your designated driver.

Total Time at the Clinic

Expect to be at the clinic for approximately 1.5 to 2.5 hours per session. For your first visit, budget closer to 3 hours, as the initial consultation may add time.

Spravato (Esketamine Nasal Spray)

The Administration

Self-administering the Spravato nasal spray takes about 10 to 15 minutes. You will use two or three spray devices (depending on your dose), with five-minute rest periods between each one.

The Required Monitoring Period

This is where Spravato sessions differ significantly from other routes. The FDA requires that you remain at the certified healthcare facility for at least two hours after administration for monitoring. During this time, staff will check your blood pressure at regular intervals and assess your condition.

Pre-Session Time

Arriving, checking in, having your blood pressure taken, and getting settled typically adds 15 to 30 minutes.

Total Time at the Facility

Expect to spend approximately 2.5 to 3 hours at the facility for each Spravato session. This is the longest time commitment of any ketamine route, primarily due to the mandatory monitoring period.

Sublingual (Oral) Ketamine

The Session Itself

Sublingual ketamine sessions — whether at home or in a clinic — typically involve:

• Allowing the medication to dissolve under the tongue for 10 to 15 minutes
• The active experience lasting approximately 45 to 90 minutes
• A gradual return to baseline over an additional 30 to 60 minutes

At-Home Sessions

If you are doing sublingual ketamine at home through a telehealth provider, plan for about two to two and a half hours from the time you take the medication until you feel mostly normal. This includes:

• Preparation and settling in (10-15 minutes)
• Medication dissolution (10-15 minutes)
• The active experience (45-90 minutes)
• Gradual recovery (30-60 minutes)

Some telehealth providers include a virtual monitoring component, which may add to the total session time but is worth the additional safety it provides.

In-Clinic Sublingual Sessions

If your sublingual session takes place in a clinic, expect a total visit of about 2 to 2.5 hours, including check-in, vitals, the session itself, and recovery.

Factors That Affect Session Length

Several factors can influence how long your session takes:

• Your dose. Higher doses may prolong both the active experience and recovery time.
• Your individual response. Some people metabolize ketamine more slowly than others, which can extend the experience.
• The condition being treated. Pain protocols often involve longer infusions than mental health protocols.
• First visit vs. subsequent visits. Your first session typically takes longer due to additional paperwork, consultation, and a more cautious approach to monitoring.
• Your provider's protocol. Different providers have different standards for pre-treatment preparation and post-treatment monitoring.

Planning Around Your Sessions

Day-Of Considerations

Regardless of the route of administration, plan the following for every treatment day:

• Do not drive. You will need someone to drive you home (or, for at-home sessions, you simply need to stay home). Do not plan to drive for the rest of the day after your session.
• Clear your schedule. Most patients find it best to have no significant obligations for the remainder of the day. You may feel drowsy, emotionally tender, or simply need to rest.
• Arrange work time off if needed. Some patients schedule sessions at the end of the workday or on days off. Others find they need the full day.

Frequency and Total Time Commitment

Beyond individual session length, consider the total time commitment across your treatment:

• Initial phase: 2-3 sessions per week for 2-3 weeks (IV/Spravato), or similar for sublingual
• Maintenance phase: Every 2-4 weeks, or as your provider recommends

For IV ketamine, the initial series represents roughly 10 to 15 hours of in-clinic time over two to three weeks. For Spravato, the initial twice-weekly phase represents about 15 to 20 hours of facility time over the first month.

Making the Most of Your Time

While the time commitment for ketamine therapy is real, most patients find it manageable once they establish a routine. Here are a few tips:

• Batch your logistics. Arrange rides, schedule time off, and prepare your space (for at-home sessions) in advance so you are not scrambling before each appointment.
• Use recovery time intentionally. The period after a session, while you are still in a reflective state, can be valuable for journaling or quiet contemplation as part of your integration practice.
• Choose a convenient provider. If you are doing in-clinic treatment, proximity to your home or work can significantly reduce the total time impact.
• Communicate with your employer. If you need regular time away from work, many patients find that a straightforward conversation with their employer (sharing only what they are comfortable with) helps reduce stress around scheduling.

The Investment of Time

Ketamine therapy requires a genuine investment of time, particularly during the initial treatment phase. But when you weigh that time against the months or years spent cycling through medications that did not work, or the daily toll of untreated depression, anxiety, or pain, most patients find it is time well spent.

Your provider can help you understand the specific time commitment for your recommended protocol and work with you to create a schedule that fits your life.

References

• MedlinePlus: Ketamine Injection — National Library of Medicine drug information on ketamine administration and duration of effects
• Mayo Clinic: Treatment-Resistant Depression — Mayo Clinic information on treatment protocols for treatment-resistant depression
• NIMH: Depression Overview — National Institute of Mental Health guide to depression treatments and what to expect