Ketamine IV therapy delivers a low dose of ketamine, an anesthetic medication, directly into your bloodstream through a vein to treat conditions like depression and chronic pain. The treatment is not FDA-approved for these purposes. Ketamine’s only FDA approval is for general anesthesia, but clinicians increasingly prescribe it off-label because of its rapid effects on mood and pain, sometimes producing noticeable improvement after a single session.
What Ketamine IV Therapy Treats
The most common reason people seek ketamine infusions is treatment-resistant depression, meaning depression that hasn’t responded to two or more standard antidepressants. Clinics also offer it for chronic pain conditions, PTSD, anxiety disorders, and suicidal ideation. In all of these cases, the use is off-label. The FDA has approved a related nasal spray called esketamine (brand name Spravato) specifically for treatment-resistant depression, but IV ketamine itself remains approved only as an anesthetic.
This distinction matters because it affects what your insurance will pay for and what level of evidence supports each use. The research base for IV ketamine in depression is substantial, with studies going back over 20 years, but the formal regulatory approval hasn’t followed for the IV form.
What Happens During an Infusion
A typical session involves sitting or reclining in a clinic chair while ketamine flows through an IV line over about 40 to 45 minutes. The standard dose is 0.5 mg/kg of body weight, though some patients respond to doses as low as 0.1 mg/kg and others need up to 0.75 mg/kg. Your provider adjusts the dose based on your response and tolerance.
During the infusion, you’ll likely feel a dreamlike or floating sensation. Some people experience mild visual distortions or feel temporarily disconnected from their surroundings. This dissociative effect is expected at these doses and typically fades within an hour or two after the drip stops. You may also feel dizzy, drowsy, or mildly nauseous. Uncontrolled eye movements can occur but resolve on their own.
Staff monitor your blood pressure, heart rate, oxygen levels, and level of sedation throughout the session. Resuscitation equipment must be available at all times, and the clinician overseeing your care should hold advanced cardiac life support certification. After the infusion ends, most clinics keep you for observation before releasing you. You won’t be able to drive yourself home.
How Many Sessions You’ll Need
Most protocols start with an induction phase of six to eight infusions spread over two to four weeks, typically given two or three times per week. Response tends to build over the course of treatment. In one study of patients receiving six infusions three times a week, only 3 out of 14 patients responded after the first infusion, but 11 of 12 who completed the full course achieved a meaningful response, and 8 reached remission.
After the induction phase, some patients return for maintenance infusions on a less frequent schedule, perhaps once every few weeks or monthly, to sustain the benefits. There’s no universal standard for how long maintenance continues. Your provider will work with you to find the minimum frequency that keeps symptoms at bay.
How Effective It Is
A study from Mass General Brigham compared IV ketamine to the FDA-approved nasal spray esketamine in patients with treatment-resistant depression. Over eight treatments given twice weekly across four to five weeks, IV ketamine reduced depression scores by about 49%, while the nasal spray achieved a 39.5% reduction. IV ketamine also worked faster: patients showed improvement immediately after the first treatment, while the nasal spray group needed two sessions before significant changes appeared.
These results are notable because treatment-resistant depression is, by definition, hard to treat. Some clinics report remission rates as high as 72% when infusions are combined with psychotherapy, though individual results vary widely. The speed of response is what sets ketamine apart from traditional antidepressants, which typically take four to six weeks to reach full effect. For people in acute crisis, that time difference can be significant.
Side Effects and Safety Risks
The most common side effects during and immediately after an infusion are dizziness, nausea, confusion, and the dissociative or dreamlike state that defines the ketamine experience. Some people feel unusually excited or restless. These effects are generally short-lived and resolve within a couple of hours.
The more serious concern is cardiovascular. Ketamine raises blood pressure and heart rate, which is why clinics monitor these throughout every session. People with severe or uncontrolled high blood pressure are typically excluded from treatment. Changes in heart rhythm can also occur, so an ECG is part of standard monitoring at many clinics.
Longer-term risks include the potential for psychological dependence, since ketamine is a Schedule III controlled substance with known abuse potential. Repeated use at high doses has been linked to bladder and urinary tract problems, though this is more commonly seen with recreational use at much higher doses than what clinics administer. The FDA has specifically warned about the risks of compounded ketamine products used without proper medical supervision, including unsupervised at-home use, where the lack of monitoring creates real danger from sedation, breathing suppression, and cardiovascular changes.
Who Should Not Get IV Ketamine
Certain conditions make ketamine infusions unsafe. Severe uncontrolled high blood pressure is a clear disqualifier because ketamine further elevates blood pressure. Active substance use disorders may also rule you out, given ketamine’s abuse potential. Clinics typically screen for a history of psychosis, since ketamine can trigger hallucinations and unusual thoughts that could worsen psychotic conditions.
Pregnancy, certain heart conditions, and elevated intracranial pressure are additional concerns your provider will evaluate. A thorough medical and psychiatric history before your first infusion is standard practice at reputable clinics.
Cost and Insurance Coverage
IV ketamine infusions typically cost between $400 and $600 per session, with a median around $500. Insurance does not cover IV ketamine for depression or pain, making it entirely out of pocket. A full induction course of six to eight sessions runs roughly $2,400 to $4,800 before any maintenance treatments.
This is where the FDA-approved nasal spray, Spravato, offers a financial advantage despite being less effective in head-to-head comparisons. Because it has formal FDA approval for depression, most commercial insurance plans cover it. With insurance, a Spravato session costs $140 to $450, and manufacturer assistance programs can bring that down to $0 to $62 per treatment. The trade-off is measurably lower efficacy and a slower onset of improvement compared to IV ketamine.
IV Ketamine vs. Nasal Spray Esketamine
Beyond cost and insurance, there are pharmacological differences between the two. IV ketamine contains both mirror-image forms of the ketamine molecule (called racemic ketamine), while the nasal spray contains only one form (esketamine). Delivering the drug intravenously also means nearly 100% of it reaches your bloodstream, whereas absorption through the nasal lining is less complete and more variable.
Both require in-clinic administration with monitoring. The nasal spray carries a mandatory two-hour observation period after each dose, enforced through an FDA safety program. IV ketamine clinics follow similar post-infusion monitoring, though the specific requirements vary by state and clinic. In practice, the experience is broadly similar: you go to a clinic, receive the treatment, wait to be cleared, and have someone drive you home.
How to Evaluate a Ketamine Clinic
Because IV ketamine is used off-label, clinic quality varies. Consensus guidelines recommend that the physician in charge hold a DEA license for Schedule III medications and advanced cardiac life support certification. The nurse administering the infusion should also be ACLS-certified and trained in moderate sedation. The clinic should have continuous monitoring of blood pressure, heart rate, oxygen saturation, and sedation level, plus resuscitation equipment immediately available.
Red flags include clinics that skip vital sign monitoring, lack resuscitation equipment, or offer unsupervised take-home ketamine products. A legitimate clinic will conduct a thorough intake evaluation, explain the off-label nature of treatment, and have clear protocols for managing adverse reactions during your infusion.