Is Ketamine Therapy Safe? Separating Facts from Fear

When patients first hear about ketamine therapy for depression, the most common reaction is hesitation. Ketamine has a reputation — as a party drug, as a veterinary anesthetic, as something that doesn't belong in a medical office.

That reputation deserves to be examined honestly. Because the clinical reality of supervised ketamine therapy is very different from what most people imagine — and for patients with treatment-resistant depression, the risk of not treating it is often far greater than the risks of the treatment itself.

Ketamine was developed in the 1960s as a surgical anesthetic and has been on the World Health Organization's List of Essential Medicines for decades. It's used daily in emergency rooms, operating rooms, and pediatric settings around the world because of its excellent safety profile as an anesthetic.

Its antidepressant properties were discovered more recently — researchers noticed that patients receiving ketamine for surgical procedures often reported dramatic mood improvements afterward. This led to decades of clinical research that has now established ketamine as one of the most effective rapid-acting antidepressants available.

The concerns people have about ketamine are largely rooted in its recreational use — high doses, unknown purity, no medical supervision, and often combined with other substances.

Medical ketamine therapy is fundamentally different:

• Precise, sub-anesthetic dosing — therapeutic doses are a fraction of what's used for anesthesia, carefully calculated by weight and clinical response
• Pharmaceutical-grade purity — no adulterants, no unknown substances
• Controlled clinical environment — vital signs monitored throughout, provider present
• Structured protocols — evidence-based dosing schedules designed for antidepressant effect
• Integration support — psychological preparation and follow-up to maximize and sustain benefits

The gap between recreational ketamine use and clinical ketamine therapy is as wide as the gap between drinking alcohol at a party and receiving IV morphine in a hospital.

Ketamine therapy has been studied extensively in clinical settings. Here's what the evidence shows:

During and immediately after a ketamine infusion, patients commonly experience:

• Dissociation — a dreamlike, detached feeling that resolves within 30–60 minutes after the infusion ends
• Mild perceptual changes — visual distortions, altered sense of time
• Nausea — occurs in a minority of patients; anti-nausea medication is available
• Elevated blood pressure and heart rate — transient, monitored throughout
• Dizziness — resolves quickly after treatment

These effects are expected, temporary, and managed in the clinical setting. Patients are monitored until they've fully recovered before being discharged. You cannot drive yourself home after a ketamine infusion — a responsible adult must accompany you.

One of the most common concerns is whether ketamine affects memory or cognition. The research is reassuring: at therapeutic doses, ketamine does not cause lasting cognitive impairment. In fact, several studies show improvements in cognitive function in depressed patients following ketamine treatment — likely because depression itself is cognitively impairing, and treating it restores function.

Ketamine does have abuse potential — this is a legitimate concern that deserves a direct answer. At recreational doses used repeatedly, psychological dependence can develop.

In clinical settings, the risk is substantially lower because:

• Treatment courses are time-limited (typically 6 infusions over 2–3 weeks)
• Doses are sub-anesthetic and carefully controlled
• Patients are screened for substance use disorders before treatment
• The clinical context doesn't produce the same reinforcement patterns as recreational use

Patients with active substance use disorders are generally not candidates for ketamine therapy, and this is assessed thoroughly during the initial evaluation.

Heavy, long-term recreational ketamine use has been associated with ketamine-induced uropathy — a serious bladder condition. This is a real concern for people using large amounts of ketamine daily over years.

At therapeutic doses used in clinical treatment courses, bladder toxicity has not been observed in the research literature. The doses and frequency used medically are far below the threshold associated with this complication.

Ketamine therapy is not appropriate for everyone. Contraindications include:

• Uncontrolled hypertension — ketamine transiently raises blood pressure
• Active psychosis or schizophrenia — ketamine can worsen psychotic symptoms
• Active substance use disorder — particularly stimulants or other dissociatives
• Certain cardiovascular conditions — assessed during evaluation
• Pregnancy

This is why a thorough medical and psychiatric evaluation is essential before beginning treatment. At Roth Family Medicine & Mental Health, we don't offer ketamine therapy to everyone who asks — we offer it to patients for whom the evidence supports it and the risk-benefit balance is favorable.

This is the conversation that often gets lost in discussions about ketamine safety: what is the risk of not treating severe, treatment-resistant depression?

Depression is a life-threatening illness. It is associated with:

• Significantly elevated suicide risk
• Increased cardiovascular mortality
• Accelerated cognitive decline
• Profound impairment in quality of life, relationships, and function

For a patient who has tried multiple antidepressants without relief and is struggling to function, the risk profile of supervised ketamine therapy — temporary dissociation, mild nausea, transient blood pressure elevation — looks very different than it does in the abstract.

At Roth Family Medicine & Mental Health, ketamine therapy is offered as part of a comprehensive treatment approach. We begin with a thorough evaluation, discuss your history and goals, and determine whether ketamine is appropriate for your situation.

Treatment is conducted in a calm, comfortable clinical environment. Your vital signs are monitored throughout, and you're supported by our team from preparation through integration.

We don't view ketamine as a standalone cure — it's a powerful tool that works best when combined with ongoing care, support, and attention to the underlying factors driving your depression.

If you'd like to learn more or discuss whether ketamine therapy might be right for you, schedule a consultation or call us at (208) 904-4705.