💉 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.
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. The standard initial series of 6 infusions ranges from $2,400–$4,800. Maintenance infusions every 3–6 weeks add ongoing costs. Most clinics offer payment plans, and HSA/FSA funds can usually be applied. IV ketamine is off-label and rarely covered by insurance.
How many IV ketamine sessions do I need?
The standard protocol for depression is 6 infusions over 2–3 weeks (typically 3 per week). About 60–70% of patients with treatment-resistant depression respond to this initial series. After the initial series, maintenance infusions are scheduled every 3–6 weeks depending on symptom recurrence. Some patients may need fewer or more sessions based on their response.
What does a ketamine infusion feel like?
During a ketamine infusion, many patients report a floating or dream-like sensation, visual distortions, altered perception of time, and mild dissociation (feeling detached from your body or surroundings). The experience varies significantly between individuals. Some describe it as deeply relaxing, while others find it disorienting. The effects begin within minutes of starting the infusion and typically resolve within 30–60 minutes after the infusion ends.
Is IV ketamine safe?
IV ketamine is generally considered safe when administered at sub-anesthetic doses (0.5 mg/kg) in a monitored clinical setting. Common side effects include nausea, dizziness, and transient blood pressure elevation, which resolve within hours. Long-term risks of repeated ketamine use may include bladder toxicity (primarily seen at much higher doses in recreational use) and potential for psychological dependence. Patients with uncontrolled hypertension, active psychosis, or certain cardiac conditions may not be candidates for ketamine therapy.