Ketamine represents the first truly new mechanism for depression treatment in decades. Unlike SSRIs that take weeks, ketamine can work within hours. Here's everything you need to know about treatment options.
How Ketamine Works
Ketamine works differently from traditional antidepressants:
- Blocks NMDA glutamate receptors
- Triggers rapid synapse formation (neuroplasticity)
- Increases BDNF (brain growth factor)
- Effects begin within hours, not weeks
- May 'reset' neural circuits involved in depression
Treatment Options Compared
Spravato (Esketamine) - FDA Approved
- Nasal spray, given in certified clinics
- FDA approved for treatment-resistant depression
- Insurance often covers (with prior auth)
- Must stay at clinic 2 hours per session
- Typical: 2x/week for 4 weeks, then maintenance
- Cost with insurance: $50-300/session
IV Ketamine - Off-Label
- Infusion over 40 minutes
- Off-label (not FDA approved for depression)
- Usually not covered by insurance
- Administered in specialized clinics
- Typical: 6 infusions over 2-3 weeks
- Cost: $400-800 per infusion
At-Home Ketamine - Telehealth
- Oral lozenges or troches
- Prescribed via telehealth companies
- Lower doses than IV/Spravato
- Must have someone present
- Monthly cost: $200-500
- Less evidence than IV/Spravato
At-home ketamine has less rigorous evidence than clinical ketamine, and some telehealth companies have faced scrutiny for lax screening. If possible, start with Spravato or IV ketamine in a clinical setting.
Who Qualifies
Ketamine is typically reserved for:
- Treatment-resistant depression (failed 2+ medications)
- Severe depression with acute suicidal ideation
- Depression not responding to therapy + medication
- Those who can't tolerate traditional antidepressants
Who Should Avoid It
- Uncontrolled high blood pressure
- History of psychosis
- Active substance abuse (especially ketamine)
- Pregnancy
- Certain eye conditions (increased pressure)
- Severe liver disease
The Bottom Line
Ketamine is a legitimate breakthrough for treatment-resistant depression, with rapid effects that traditional antidepressants can't match. If you've tried multiple medications without success, it's worth discussing with your psychiatrist.