Ketamine has emerged as one of the most significant advances in depression treatment in decades. Unlike traditional antidepressants that take weeks to work, ketamine can produce relief within hours. Here's what you need to know.
How Ketamine Works
Ketamine works through a completely different mechanism than SSRIs. It blocks NMDA glutamate receptors, which triggers a cascade of effects including increased BDNF (brain-derived neurotrophic factor) and rapid synapse formation.
Two Forms: IV Ketamine vs. Spravato
IV Ketamine (Off-Label)
- Administered intravenously at ketamine clinics
- Not FDA-approved for depression (off-label use)
- Typically 6 infusions over 2-3 weeks, then maintenance
- Cost: $400-800 per infusion, rarely covered by insurance
- Generic ketamine, well-studied
Spravato (Esketamine Nasal Spray)
- FDA-approved for treatment-resistant depression
- Administered as nasal spray at certified healthcare facilities
- Must stay for 2-hour observation after each dose
- More likely to be covered by insurance
- Only available through REMS program
What to Expect During Treatment
During a ketamine session:
- Effects begin within minutes
- You may feel dissociated, floaty, or experience perceptual changes
- Some people have meaningful psychological insights
- Sessions last 40-60 minutes for IV, 2 hours for Spravato
- You cannot drive for 24 hours after treatment
Effectiveness
Who Is a Good Candidate
- Failed 2 or more antidepressants (treatment-resistant)
- Need rapid relief (severe symptoms, suicidal thoughts)
- Unable to tolerate other medications
- Willing to commit to multiple sessions
- No history of psychosis or substance abuse
Who Should Avoid Ketamine
- Active substance abuse (especially ketamine)
- Uncontrolled hypertension
- History of psychosis
- Pregnant or breastfeeding
- Certain cardiac conditions
Costs and Insurance
Cost remains a significant barrier:
- IV ketamine: $400-800 per infusion, 6+ needed initially
- Total initial course: $2,400-5,000+
- Maintenance: 1-2 sessions monthly
- Spravato: Often covered by insurance with prior authorization
- Some clinics offer financing or sliding scale
Finding a Provider
Look for clinics with:
- Medical doctor oversight (psychiatrist or anesthesiologist)
- Proper monitoring equipment
- Clear plans for handling side effects or bad reactions
- Integration support or therapy referrals
- Transparent pricing
The Bottom Line
Ketamine offers genuine hope for treatment-resistant depression, with faster onset than any other option. It's not a cure—most people need ongoing maintenance—but for those who haven't responded to other treatments, it can be life-changing.