ECT vs. Ketamine Therapy: Comparing Side Effects & Safety

Many patients arrive at this crossroad after several medications and months of hard work. They’ve heard about electroconvulsive therapy (ECT) and ketamine therapy and want a clear, plain-language comparison. In clinical practice, it’s common to see both options help some people with treatment‑resistant depression. 

This guide explains what modern ECT actually involves, how it compares with ketamine treatment, what the stigma is around both treatments and how to combat it, how people decide, and where the two may fit together over time.

What ECT is today (modern anesthesia, physiology, overlap with ketamine’s downstream effects)

Modern ECT is a carefully planned medical procedure done under general anesthesia with continuous monitoring. A brief, controlled sequence of electrical impulses is passed through the scalp and into discrete areas of the brain. These pulses are delivered over a matter of several seconds to excite brain cells, resulting in hyperactivation that can last for a brief time longer. An anesthesiologist provides short‑acting anesthesia and a muscle relaxant to keep the treatment comfortable. A psychiatrist trained in neuromodulation chooses the stimulus settings and where in the brain the stimulus is provided based on your diagnosis, medical history, and past response.

ECT aims to exercise the brain (which is the hyperactivation alluded to before - a "modified seizure"). This stimulates related networks that have become rigid and under‑responsive through these currents. This activation triggers cascades of neurotransmitters and neurotrophic signals that can restore balance in networks involved with motivation, sleep, and affect regulation. Many clinicians describe the effect as increasing plasticity and resetting network rhythms, much like how ketamine therapy achieves the same effects through different mechanisms. 

Where ECT and ketamine therapy overlap is not in the momentary experience or treatment administration, but in some downstream biology effects. Ketamine works differently by engaging glutamate signaling at AMPA receptors^[9] which boosts a growth hormone called “BDNF,” changes how the brain manages endorphins (the “feel good” chemicals associated with a runner’s high), alters how brain cells register anxiety and futility, and ultimately causes the growth and maintenance of connections in the brain (a process called “synaptogenesis”).^[1] ECT increases neurotrophic factors and connectivity as well. The paths are different, yet both can create conditions where learning and behavior change may take hold. The experience, logistics, equipment required, and side‑effect profiles are quite distinct.

The stigma around ECT & what the modified seizure actually does 

Some people rightly are concerned when hearing the word “seizure” described as an intentional, safe, and integral part of the ECT experience. It’s a word and a treatment coated in decades of stigma through how the treatment is portrayed in the media, how the treatment is misunderstood by the public – and providers, alike! – and how little the treatment is spoken about commonly. 

In fact, these seizures are induced by carefully controlled electrical impulses and rigorously monitored for safety and efficacy. Under careful supervision, these seizures can be instrumental in providing stimulation to parts of the brain that can result in a system that operates more effectively. 

Indications, pace of relief, safety conversations for ECT and ketamine therapy 

When clinicians consider ECT

• Severe major depression that has not responded to multiple medication trials or psychotherapy
• Depression with psychotic features
• Catatonia 
• When a rapid, reliable intervention is needed because the illness is dangerously impairing

When clinicians consider ketamine therapy

• Treatment‑resistant depression after several medication trials
• Patients seeking a different mechanism with the possibility of earlier symptom change
• Individuals open to monitored dosing that can include short‑term perceptual shifts
• Individuals who are concerned about ECT side effects

Pace of relief

• Many patients begin to improve during the acute ECT series (often 2–3 sessions per week for several weeks). Some notice changes within the first few treatments, others later in the course.
• With ketamine treatment, some people feel relief within hours to days of early doses.^[2] Spravato treatment typically occurs twice weekly for the first month, then tapers.

Safety conversations

• ECT: short anesthesia exposure, brief controlled seizure through electrical currents, and potential cognitive side effects. Some patients experience temporary confusion after sessions and varying degrees of memory effects, which are discussed in detail before starting. Medical screening and coordination with other clinicians are standard.
• Ketamine therapy: transient increases in blood pressure and pulse, nausea for some, and short‑term perceptual/psychedelic or dissociative symptoms during dosing.^[3,4,5] After Spravato treatment or ketamine dosing, you cannot drive until the next day and will need a ride home. Monitoring occurs on‑site.

Neither option is completely risk‑free and both suffer from some degree of stigma, despite exhibiting a clinically-proven safety and efficacy profile for their respective indications. Many patients decide between ECT and ketamine therapy by weighing medical history, urgency, and the kind of experience they feel open to having.

References

1. Li N, Lee B, Liu RJ, et al. mTOR-dependent synapse formation underlies the rapid antidepressant effects of NMDA antagonists. Science. 2010;329(5994):959-64. PubMed
2. Berman RM, Cappiello A, Anand A, et al. Antidepressant effects of ketamine in depressed patients. Biol Psychiatry. 2000;47(4):351-4. PubMed
3. Wan LB, Levitch CF, Perez AM, et al. Ketamine safety and tolerability in clinical trials for treatment-resistant depression. J Clin Psychiatry. 2015;76(3):247-52. PubMed
4. Riva-Posse P, Reiff CM, Edwards JA, et al. Blood pressure safety of subanesthetic ketamine for depression: A report on 684 infusions. J Affect Disord. 2018;236:291-297. PubMed
5. Short B, Fong J, Galvez V, et al. Side-effects associated with ketamine use in depression: a systematic review. Lancet Psychiatry. 2018;5(1):65-78. PubMed
6. Rhee TG, Shim SR, Forester BP, et al. Efficacy and Safety of Ketamine vs Electroconvulsive Therapy Among Patients With Major Depressive Episode: A Systematic Review and Meta-analysis. JAMA Psychiatry. 2022;79(12):1162-1172. PubMed
7. Anand A, Mathew SJ, Sanacora G, et al. Ketamine versus ECT for Nonpsychotic Treatment-Resistant Major Depression. N Engl J Med. 2023;388(25):2315-2325. PubMed
8. Wilkinson ST, Holtzheimer PE, Gao S, et al. Leveraging Neuroplasticity to Enhance Adaptive Learning: The Potential for Synergistic Somatic-Behavioral Treatment Combinations to Improve Clinical Outcomes in Depression. Biol Psychiatry. 2019;85(6):454-465. PubMed
9. Zanos P, Moaddel R, Morris PJ, et al. NMDAR inhibition-independent antidepressant actions of ketamine metabolites. Nature. 2016;533(7604):481-6. PubMed

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Frequently Asked Questions

Is ECT still used to treat depression?

Yes. Modern ECT remains one of the most effective treatments for severe, treatment-resistant depression, psychotic depression, and related conditions, and it is delivered with anesthesia and close monitoring for safety.

How do the safety risks of ketamine therapy compare to ECT?

They carry different risk profiles. ECT involves brief anesthesia and a controlled seizure, with potential cognitive and cardiovascular effects discussed in advance, while ketamine therapy involves monitored dosing with short-term perceptual changes and cardiovascular monitoring. Your medical history and desired next step in your care plan will help guide which fits you.

How does recovery differ between ECT and Spravato treatment?

After ECT, you typically rest for the day, avoid driving, and may feel tired or foggy as the anesthesia wears off, with some temporary memory effects reviewed beforehand. After esketamine (Spravato), you stay for observation, arrange a ride home, and avoid driving until the next day, with perceptual changes that usually resolve the same day.

Can ECT and ketamine therapy be combined?

Some people use both across a year, often one after the other rather than at the same time. Your care team coordinates timing based on how you're responding, safety, and logistics.

Will psychotherapy help alongside either ECT or ketamine therapy?

Many people find psychotherapy or their own self-guided practice useful alongside either treatment. Ketamine and esketamine (Spravato) tend to affect memory less than ECT, which some find makes it easier to build on gains from psychotherapy afterward.