definition
Articles tagged with “definition”
Treatment-Resistant Depression (TRD): Definition, Criteria, and Significance for Ketamine
A definition of treatment-resistant depression — depression that fails to respond to adequate trials of standard antidepressants — and why it is the primary indication for ketamine therapy.
Synaptogenesis: How Ketamine Promotes New Synaptic Connections
A definition of synaptogenesis — the formation of new synapses — and an explanation of how ketamine rapidly triggers this process to produce antidepressant effects.
Sub-Anesthetic Dose: The Therapeutic Range for Ketamine in Depression
A definition of sub-anesthetic dosing — the low-dose ketamine range used to treat depression — including typical dosages, rationale, and how it differs from anesthetic use.
Schedule III Controlled Substance: Ketamine's DEA Classification Explained
A definition of Schedule III controlled substance status under the Controlled Substances Act, what it means for ketamine prescribing, and how it compares to other drug schedules.
Serotonin Syndrome: Risks, Symptoms, and Relevance to Ketamine Therapy
A definition of serotonin syndrome — a potentially dangerous condition caused by excess serotonergic activity — and its relevance to patients combining ketamine with SSRIs or other serotonergic medications.
Racemic Mixture: S-Ketamine and R-Ketamine Enantiomers Explained
A definition of racemic mixture in the context of ketamine therapy — explaining the S and R enantiomers, their different pharmacological profiles, and clinical implications.
Norketamine: Ketamine's Primary Metabolite Explained
A definition and detailed explanation of norketamine — the main metabolite produced when the body processes ketamine — including its pharmacological activity, clinical significance, and role in oral ketamine therapy.
NMDA Receptor
A comprehensive definition and explanation of the NMDA receptor — its role in the brain, its relevance to ketamine therapy, and why it matters for mental health treatment.
mTOR Pathway: Ketamine's Role in Protein Synthesis and Synaptic Growth
A definition of the mTOR (mechanistic target of rapamycin) signaling pathway and its critical role in how ketamine promotes rapid synaptogenesis and antidepressant effects.
Neuroplasticity
What neuroplasticity means, how the brain rewires itself, and why neuroplasticity is central to understanding ketamine's rapid antidepressant effects.
Glutamatergic System: The Excitatory Signaling Network Behind Ketamine's Effects
An overview of the glutamatergic system — the brain's primary excitatory neurotransmitter network — and its central role in how ketamine produces rapid antidepressant effects.
Glutamate: The Excitatory Neurotransmitter Central to Ketamine's Action
Understand glutamate, the brain's primary excitatory neurotransmitter, its role in neural signaling, and why it is fundamental to how ketamine works.
GABA (Gamma-Aminobutyric Acid): The Brain's Primary Inhibitory Neurotransmitter
A definition of GABA — the brain's main inhibitory neurotransmitter — and its relationship to ketamine's mechanism of action and therapeutic effects.
Esketamine: The S-Enantiomer Behind Spravato
A glossary entry on esketamine, the S-enantiomer of ketamine marketed as Spravato, covering its pharmacology, FDA approval, and clinical significance.
First-Pass Metabolism: How Liver Processing Affects Oral Ketamine
A definition of first-pass metabolism — the hepatic processing that reduces oral drug bioavailability — and its specific impact on oral ketamine formulations.
Enantiomer: Definition and Relevance to Ketamine
A definition of enantiomers — mirror-image molecular forms — and their critical importance in understanding ketamine's two forms: esketamine (S-ketamine) and arketamine (R-ketamine).
Dissociation
What dissociation means in the context of ketamine therapy — its clinical definition, how it manifests during treatment, and its potential relationship to therapeutic outcomes.
Default Mode Network: How Ketamine Disrupts Depressive Thought Patterns
An explanation of the default mode network (DMN), its role in rumination and depression, and how ketamine modulates DMN activity to relieve depressive symptoms.
Bioavailability: Understanding Ketamine Absorption by Route
A clear explanation of bioavailability and how it varies across ketamine administration routes — IV, IM, intranasal, sublingual, and oral — and why it matters.
Compounding Pharmacy: Custom Ketamine Formulations Explained
A definition of compounding pharmacy — a specialized pharmacy that prepares customized medications — and its essential role in making ketamine available in oral, sublingual, and other non-standard formulations.
BDNF (Brain-Derived Neurotrophic Factor): Definition and Role in Ketamine Therapy
Learn what BDNF (Brain-Derived Neurotrophic Factor) is, how it supports brain health, and why it is central to ketamine's rapid antidepressant mechanism.
Arketamine (R-Ketamine): The Promising Enantiomer Under Investigation
Learn about arketamine (R-ketamine), the less-studied enantiomer of ketamine showing promise as a next-generation antidepressant with fewer side effects.
AMPA Receptor: Its Role in Ketamine's Antidepressant Effect
A glossary entry on the AMPA receptor, explaining what it is, how it functions, and why its activation is essential to ketamine's rapid antidepressant mechanism.
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