💉 IV Ketamine Infusion
Intravenous ketamine infusion delivers ketamine directly into the bloodstream for the fastest onset of therapeutic effects. It is the most widely studied form of ketamine therapy.
Reviewed for clinical accuracy against peer-reviewed literature and FDA guidelines · Last reviewed March 2026
About IV Ketamine Infusion
IV ketamine infusions typically last 40–60 minutes and are administered in a clinical setting under medical supervision. The standard protocol involves 6 infusions over 2–3 weeks, with maintenance infusions as needed. Studies show response rates of 60–70% for treatment-resistant depression. A landmark 2006 study by Zarate et al. published in the American Journal of Psychiatry demonstrated that a single IV ketamine infusion produced rapid antidepressant effects within hours in patients with treatment-resistant depression — a finding that has since been replicated in dozens of clinical trials.
IV ketamine works by blocking NMDA receptors and triggering a cascade of neuroplasticity-related changes, including increased BDNF (brain-derived neurotrophic factor) and rapid synaptogenesis. Unlike traditional antidepressants that take 4–8 weeks to reach full efficacy, IV ketamine can produce noticeable mood improvements within hours to days. The American Psychiatric Association (APA) consensus statement (2017) acknowledges ketamine's rapid antidepressant properties while noting the need for further research on long-term safety and optimal dosing protocols.
Most IV ketamine clinics administer the drug at a sub-anesthetic dose of 0.5 mg/kg over 40 minutes for depression. Higher doses and longer infusion times may be used for chronic pain conditions such as CRPS (complex regional pain syndrome) and fibromyalgia. Patients typically remain conscious but may experience dissociative effects, visual disturbances, and a sense of floating. Medical staff monitor heart rate, blood pressure, and oxygen saturation throughout the procedure.
Typical protocol: 6 infusions over 2–3 weeks • Commonly treats: treatment-resistant depression, anxiety, PTSD, chronic pain, OCD, and suicidal ideation
What to Expect During IV Ketamine Treatment
You arrive at the clinic and are seated in a comfortable reclining chair. A nurse places an IV line, typically in your arm. The ketamine is infused slowly over 40-60 minutes at a sub-anesthetic dose (0.5 mg/kg for depression, higher for pain). You may experience dissociative effects, visual changes, and a floating sensation. Staff monitor vital signs throughout. After the infusion, you rest for 30-60 minutes until effects subside. You cannot drive yourself home — arrange a ride. Most protocols involve 6 infusions over 2-3 weeks, followed by maintenance infusions every 3-6 weeks.
Side Effects
Nausea (26-40%), dizziness, dissociation, increased blood pressure (transient), blurred vision, fatigue. Most side effects resolve within 2 hours. Serious side effects are rare at sub-anesthetic doses.
Insurance & Cost
IV ketamine is off-label and rarely covered by insurance. Most patients pay out-of-pocket ($400-800 per infusion, $2,400-4,800 for initial series). Some clinics offer payment plans. HSA/FSA funds can typically be used.
Frequently Asked Questions
How much does IV ketamine cost?
A single IV ketamine infusion typically costs $400–$800, with the standard initial series of 6 infusions ranging from $2,400–$4,800 out of pocket. Maintenance infusions every 3–6 weeks add ongoing costs of roughly $4,800–$12,800 per year depending on how frequently you need sessions. Because IV ketamine is used off-label for depression and other psychiatric conditions, most private insurance plans and Medicare do not cover it. However, many clinics offer structured payment plans, accept HSA and FSA funds, and provide sliding-scale pricing for patients who qualify financially. By comparison, FDA-approved Spravato nasal spray is more often covered by insurance but requires treatment at a certified REMS facility and documented failure of at least 2 antidepressants. When evaluating the total cost, factor in the full initial series plus anticipated maintenance sessions over the first year, and ask your clinic about all available financing options before beginning treatment.
How many IV ketamine sessions do I need?
The standard protocol for depression is 6 infusions over 2–3 weeks, typically scheduled as 3 sessions per week at a sub-anesthetic dose of 0.5 mg/kg. About 60–70% of patients with treatment-resistant depression respond to this initial series, according to data reviewed by the American Psychiatric Association in their 2017 consensus statement. After completing the induction phase, maintenance infusions are scheduled every 3–6 weeks depending on how quickly symptoms recur. Some patients sustain benefits for several months between sessions, while others need more frequent treatments. Your clinician will track your progress using validated depression scales such as the PHQ-9 to determine the optimal maintenance schedule. If you do not experience meaningful improvement after the initial 6 infusions, your provider may adjust the dose, increase session frequency, or recommend an alternative treatment approach such as Spravato or ketamine-assisted psychotherapy.
What does a ketamine infusion feel like?
During a ketamine infusion at the standard 0.5 mg/kg dose for depression, many patients report a floating or dream-like sensation, visual distortions, altered perception of time, and mild dissociation — a feeling of detachment from your body or surroundings. The experience varies significantly between individuals and can even differ between sessions for the same person. Some describe it as deeply relaxing and introspective, while others find it disorienting or unusual. Clinical trials report that approximately 41% of patients experience noticeable dissociative symptoms during treatment. Effects begin within minutes of starting the infusion and typically resolve within 30–60 minutes after it ends. Staff monitor your vital signs throughout, and most clinics provide a calm, dimly lit environment with noise-canceling headphones or ambient music to improve comfort. Patients should arrange a ride home afterward, as driving is not permitted on the day of treatment.
Is IV ketamine safe?
IV ketamine is generally considered safe when administered at sub-anesthetic doses of 0.5 mg/kg in a monitored clinical setting, according to the American Psychiatric Association 2017 consensus statement. Common side effects include nausea (occurring in 26–40% of patients), dizziness, and transient blood pressure elevation, all of which typically resolve within 1–2 hours after the infusion ends. Long-term risks of repeated use may include bladder toxicity, though this is primarily seen at much higher doses in recreational use rather than clinical treatment. Potential for psychological dependence exists but remains low under supervised medical protocols. Patients with uncontrolled hypertension, active psychosis, unstable cardiovascular disease, or a history of substance abuse may not be appropriate candidates. Always discuss your complete medical history with your provider before starting treatment to ensure ketamine therapy is safe for your specific situation.
Conditions Treated with IV Ketamine
Learn how iv ketamine infusion is used for these conditions.
Depression
Treatment-resistant depression (TRD). 60-70% response rate with ketamine therapy.
Anxiety
Anxiety disorders including GAD and social anxiety. Rapid relief via glutamate modulation.
PTSD
Post-traumatic stress disorder. Facilitates trauma reprocessing and extinction learning.
Chronic Pain
Fibromyalgia, CRPS, and neuropathic pain. NMDA receptor antagonism reduces central sensitization.
OCD
Obsessive-compulsive disorder. Emerging evidence shows rapid reduction in obsessive thoughts.
Bipolar Depression
Depressive phase of bipolar disorder. Rapid mood improvement without triggering mania.
Suicidal Ideation
Acute suicidal ideation. Fastest-acting intervention, effects within hours.