Relief for Anxiety That Hasn't Responded to Conventional Treatment
For Canadians living with treatment-resistant anxiety disorders — including GAD, social anxiety, panic disorder, OCD, and PTSD-related anxiety — ketamine therapy offers a new mechanism when SSRIs and therapy alone haven't been enough.
Why Ketamine Works Differently for Anxiety
Most anxiety medications — SSRIs, SNRIs, benzodiazepines — work on serotonin, norepinephrine, or GABA pathways. While effective for many, a significant portion of patients see only partial relief or none at all after multiple medication trials.
Ketamine targets the glutamate system via NMDA receptor blockade, triggering a rapid increase in BDNF and promoting neuroplasticity. This allows the brain to form new, healthier neural pathways — effectively loosening the rigid fear-based patterns that underlie chronic anxiety.
The result for many patients is a rapid reduction in anxiety symptoms — often within hours to days — along with a broader sense of psychological flexibility that can make concurrent therapy more effective.
~70%
Of treatment-resistant patients report meaningful symptom improvement
Hours to days
Typical onset of relief — far faster than SSRIs or SNRIs
4–6 sessions
Standard initial infusion course for most anxiety protocols
Anxiety Disorders Treated with Ketamine
Ketamine therapy is being used across a range of anxiety presentations, particularly where conventional treatments have not provided adequate relief.
Generalised Anxiety Disorder (GAD)
Persistent, excessive worry about everyday situations that is difficult to control. Ketamine's rapid neuroplastic effects can interrupt the chronic rumination cycles that define GAD.
Social Anxiety Disorder
Intense fear of social situations and scrutiny by others. Emerging evidence suggests ketamine can reduce the hypervigilance and avoidance behaviours central to social anxiety.
Panic Disorder
Recurrent unexpected panic attacks and persistent fear of future attacks. Ketamine's anxiolytic properties may reduce both the frequency and anticipatory anxiety associated with panic disorder.
Obsessive-Compulsive Disorder (OCD)
Intrusive thoughts and compulsive behaviours driven by anxiety. Glutamate dysregulation is implicated in OCD, making ketamine's NMDA antagonism a mechanistically relevant treatment avenue.
PTSD-Related Anxiety
Hyperarousal, avoidance, and intrusive symptoms following trauma. Ketamine has shown particular promise for PTSD, with several trials demonstrating rapid reduction in both PTSD and comorbid anxiety symptoms.
Anxiety with Comorbid Depression
Anxiety and depression co-occur in the majority of cases. Ketamine addresses both simultaneously — a significant advantage over medications that target only one condition at a time.
What the Evidence Shows
Research into ketamine for anxiety disorders is growing rapidly, with several well-designed trials now supporting its use.
Rapid Anxiolytic Effect
A 2017 study in Neuropsychopharmacology found a single subanesthetic ketamine infusion produced significant reductions in anxiety symptoms within hours, with effects lasting up to two weeks in some patients.
PTSD & Trauma-Related Anxiety
A 2021 randomised controlled trial published in JAMA Psychiatry found repeated ketamine infusions produced significantly greater PTSD symptom reduction than midazolam, with effects sustained at the two-week follow-up.
OCD & Glutamate Dysregulation
Multiple studies have identified glutamate system abnormalities in OCD. A 2013 trial found a single ketamine infusion produced rapid, significant OCD symptom reduction — supporting the glutamate hypothesis and ketamine's mechanism.
Neuroplasticity & Lasting Change
Ketamine's promotion of BDNF and synaptogenesis creates a window of enhanced neuroplasticity. When combined with psychotherapy during this window, patients may achieve more durable anxiety relief than with medication alone.
What to Expect from Treatment
Psychiatric Assessment
A psychiatrist or physician reviews your anxiety diagnosis, medication history, and medical background to confirm you're a suitable candidate for ketamine therapy.
Initial Infusion Course
Most protocols involve 4–6 IV infusions over 2–3 weeks. Each session lasts 40–60 minutes in a comfortable clinical setting with continuous vital sign monitoring.
Integration Therapy
The 24–72 hours after each infusion represent a heightened neuroplastic window. Many clinics pair infusions with psychotherapy during this period to help consolidate new, healthier thought patterns.
Maintenance as Needed
Patients who respond well may receive maintenance infusions monthly or as needed. Your treatment team will guide the right schedule based on your response and symptom trajectory.
Safety & Suitability
Ketamine therapy for anxiety is administered at sub-anaesthetic doses under continuous physician supervision with vital sign monitoring. At these doses it has a well-established safety profile. Not everyone is a suitable candidate — ketamine is generally not recommended for people with active psychosis, uncontrolled hypertension, certain substance use disorders, or pregnancy. A thorough psychiatric assessment is required before treatment begins.
This page is for informational purposes only and does not constitute medical advice. Speak with a qualified psychiatrist or physician to determine whether ketamine therapy is appropriate for your specific situation.
Ready to Explore Ketamine Therapy for Anxiety?
Browse our directory of verified Canadian ketamine clinics to find a provider near you. Most clinics offer a free initial consultation to discuss your history and whether you're a suitable candidate.
This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before beginning any new treatment. Ketamine therapy must only be administered under the supervision of a licensed medical professional in a regulated clinical setting.