A single dose triggers a four-stage cascade inside your brain. Receptors block, glutamate surges, signaling pathways activate, and new synaptic connections form. The result is weeks of clinical response from a few hours of treatment. Every claim below is cited to published neuroscience.
Scroll to follow the four-stage cascade from receptor binding to new synaptic connections. Each claim is anchored to published neuroscience literature.
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Stage 1 — minutes after administration
Ketamine binds non-competitively to the NMDA receptor on inhibitory interneurons. By temporarily blocking this receptor, ketamine releases the brain’s glutamate system from its usual GABA-driven brake.
Stage 2 — within the first hour
With the GABA brake released, excitatory pyramidal neurons release a brief burst of glutamate into the synaptic cleft. This surge is the first measurable downstream effect and is required for the antidepressant response.
Stage 3 — 1 to 24 hours
The released glutamate activates AMPA receptors on post-synaptic neurons. AMPA activation triggers intracellular signaling cascades (mTOR pathway) that begin the process of building new synaptic protein.
Stage 4 — 24 hours to weeks
mTOR activation drives the release of brain-derived neurotrophic factor (BDNF). BDNF promotes growth of new dendritic spines — the physical points of synaptic connection. Patients commonly report the lift in mood as these new connections stabilize.
The science is the foundation. These guides apply the same evidence base to specific symptoms, decisions, and clinical situations.
Symptoms
Anhedonia, rumination, panic, brain fog, hopelessness — patient-language guides to specific symptoms and when ketamine is appropriate.
Screening
PHQ-9, GAD-7, PCL-5, AUDIT-C, MDQ, ISI and more — scored in your browser. Optional save-to-chart with consent.
Alternatives
SSRIs, benzodiazepines, stimulants, SNRIs and others — what they do, common reasons people switch, and where ketamine fits.
Comparisons
Lexapro vs Zoloft, SSRIs vs SNRIs, therapy vs medication, TMS vs ECT — head-to-head clinical decision guides.
By profession
Lawyers, tech workers, therapists, teachers, students, entrepreneurs — stressor-specific considerations and privacy.
Safety
500+ drug-specific interaction guides — medications you might be taking, what to know, when it matters.
Specific decisions patients ask about most.
Comparison
Ketamine vs Spravato
Racemic ketamine vs esketamine
Comparison
Sublingual vs IV Ketamine
Same medication, different routes
Comparison
Lexapro vs Wellbutrin
SSRI vs NDRI mechanism
Symptom
Emotional Numbness
SSRI blunting and recovery
Symptom
Hopelessness
Clinical priority symptom
Screening
MDQ (Bipolar)
Critical pre-treatment screen
Screening
AUDIT-C (Alcohol)
3-item alcohol-use screen
Alternative
MAOIs
Treatment-resistant antidepressant class
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