Ketamine vs TMS: Which Depression Treatment is Right for You?

When traditional antidepressants have not provided the relief you need, two of the most promising alternatives are ketamine therapy and transcranial magnetic stimulation (TMS). Both have strong clinical evidence supporting their use for treatment-resistant depression, but they work through entirely different mechanisms, operate on different timelines, and present different practical considerations. This comparison will help you understand which approach -- or potentially both -- might be right for your situation.

How TMS Works

Transcranial magnetic stimulation uses precisely targeted magnetic pulses to stimulate specific regions of the brain involved in mood regulation. A magnetic coil is placed against your scalp, and it delivers focused electromagnetic energy to the left dorsolateral prefrontal cortex -- a brain region consistently shown to be underactive in depression.

These magnetic pulses generate small electrical currents in the targeted brain tissue, gradually increasing neural activity in the region over the course of multiple treatment sessions. Think of it as a physical therapy approach for the brain: repeated stimulation strengthens neural circuits that depression has weakened.

TMS is non-invasive -- nothing enters your body. You sit in a chair, the coil is positioned against your head, and you experience a tapping or clicking sensation during the treatment. Most patients can read, watch their phone, or simply relax during sessions. You can drive yourself to and from treatment and return to normal activities immediately.

How Ketamine Therapy Works

Ketamine operates through a fundamentally different biological pathway. Rather than externally stimulating brain regions, ketamine works from the inside by temporarily blocking NMDA glutamate receptors. This blockade triggers a cascade of neurochemical events: increased AMPA receptor activation, release of brain-derived neurotrophic factor (BDNF), and rapid growth of new synaptic connections.

The result is a burst of neuroplasticity -- a window during which the brain is uniquely capable of forming new neural pathways and breaking free from the rigid patterns that characterize depression. This mechanism is pharmacological rather than electromagnetic, and it produces effects on a dramatically faster timeline than TMS.

At-home ketamine therapy through Tovani Health involves sublingual administration in a comfortable, familiar setting with a support person present. Our safety protocols ensure the experience is both medically sound and therapeutically optimized.

Timeline: When Each Treatment Starts Working

This is one of the starkest differences between the two treatments.

TMS timeline:

• Requires 20 to 36 sessions over four to six weeks (daily weekday sessions)
• Most patients begin noticing improvement around weeks two to three
• Full therapeutic effects typically develop by weeks four to six
• Some patients do not notice improvement until after the treatment course is complete
• Newer accelerated TMS protocols (like Stanford Neuromodulation Therapy) can compress treatment into five days, though availability is limited

Ketamine therapy timeline:

• Initial improvement often noticed within hours to days of the first session
• Treatment series typically involves six to eight sessions over four to six weeks
• Each session lasts one to two hours (including recovery time)
• Cumulative benefits build with each session
• Maintenance sessions at reduced frequency sustain improvement

For patients in acute distress who need rapid relief, ketamine's timeline advantage is significant. TMS produces lasting structural changes, but the weeks required to see results can be difficult for patients who are suffering now.

Effectiveness and Response Rates

Both treatments have solid clinical evidence, though they have been studied differently.

TMS response rates:

• Approximately 50 to 60 percent of treatment-resistant depression patients show meaningful improvement
• About 30 to 35 percent achieve full remission
• Effects can be long-lasting, with many patients maintaining improvement for months to a year or more
• Retreatment courses can be effective when benefits wane

Ketamine therapy response rates:

• Approximately 60 to 70 percent of treatment-resistant depression patients respond
• Remission rates of approximately 30 to 40 percent
• Onset of improvement is faster, but maintenance treatment is typically needed to sustain gains
• Response to the initial session is often predictive of overall treatment outcome

The response rates are broadly comparable, though ketamine tends to show slightly higher initial response rates. The key difference is sustainability: TMS effects may last longer after a completed treatment course, while ketamine typically requires ongoing maintenance sessions.

The Treatment Experience

Understanding what each treatment actually feels like helps many patients in their decision-making.

During TMS:

• You sit upright in a treatment chair
• A magnetic coil is held against your scalp
• You hear clicking sounds and feel a tapping sensation
• Sessions last 20 to 40 minutes (3 minutes for some newer protocols)
• You remain fully alert and aware throughout
• Most patients describe it as mildly uncomfortable but tolerable
• No cognitive or perceptual changes during treatment
• You can drive immediately afterward and resume all normal activities

During ketamine therapy:

• You recline comfortably at home
• You dissolve the medication under your tongue
• You experience dissociation, altered perception, and deep relaxation
• Active effects last 45 to 90 minutes
• Your support person is present throughout
• Many patients describe meaningful or even profound psychological experiences
• You cannot drive for 24 hours and have activity restrictions
• Recovery to baseline typically occurs within a few hours

Neither experience is inherently better or worse -- they are simply different. Some patients prefer TMS's alertness and lack of perceptual changes. Others find ketamine's dissociative experience therapeutically valuable in itself, providing a different perspective on their depression.

Cost and Insurance

TMS insurance coverage:

• FDA-cleared for treatment-resistant depression since 2008
• Covered by most major insurance plans after documented failure of antidepressant trials
• Prior authorization typically required
• Out-of-pocket with insurance: varies widely, from minimal copays to several thousand dollars
• Without insurance: $6,000 to $12,000 for a full treatment course

Ketamine therapy costs:

• Most at-home ketamine therapy is not covered by insurance (off-label use)
• Total cost for an initial treatment course is typically lower than out-of-pocket TMS
• Ongoing maintenance sessions represent an additional cost
• No facility fees since treatment occurs at home

If your insurance covers TMS with reasonable copays, TMS may be the more financially accessible option. If insurance coverage is not available or copays are high, at-home ketamine therapy often provides a more affordable path to treatment.

Practical Logistics

TMS requires:

• Daily visits to a treatment center, five days per week, for four to six weeks
• Each visit takes approximately one hour (including setup and treatment)
• Proximity to a TMS provider
• Significant time commitment away from work and other responsibilities

At-home ketamine therapy requires:

• Sessions one to two times per week
• An adult support person present during treatment
• 24-hour activity restrictions after each session
• No travel to a treatment facility

For patients who can accommodate daily clinic visits, TMS offers the advantage of no activity restrictions or support person requirements. For patients who cannot maintain a daily appointment schedule -- due to work, caregiving, transportation, or geographic barriers -- at-home ketamine therapy provides a more accessible option.

Can You Combine Ketamine and TMS?

This is an increasingly discussed approach, and there is preliminary evidence suggesting the combination may be more effective than either treatment alone. The rationale is compelling: TMS strengthens neural circuits in the prefrontal cortex through repeated stimulation, while ketamine promotes rapid synapse formation and neuroplasticity. Together, they may address depression from complementary angles.

Some clinicians are beginning to offer combined protocols where ketamine provides rapid initial relief while TMS builds longer-term structural changes. This approach is still being studied formally, but early clinical experience is encouraging.

If you are currently receiving TMS and not seeing adequate results, or if you have completed a TMS course and are looking for additional benefit, ketamine therapy may be a valuable complement. Similarly, if you are responding well to ketamine but want to enhance the durability of your gains, TMS could be worth discussing with your treatment team.

Finding the Right Path Forward

There is no single "best" treatment for depression that applies to every patient. TMS and ketamine each have genuine strengths, and the right choice depends on your specific clinical situation, practical constraints, and personal preferences.

What matters most is that you are exploring evidence-based options beyond traditional antidepressants. If conventional medications have left you still struggling, both TMS and ketamine represent real, well-studied alternatives with meaningful response rates.

Check your eligibility for at-home ketamine therapy with Tovani Health to learn whether this approach could help -- whether as a standalone treatment or as part of a broader strategy that might include other modalities like TMS.