Description
Buy S-Ketamine Canada — Most Potent Ketamine Enantiomer
S-Ketamine Canada — the (S) enantiomer of ketamine, also known as esketamine, and the most pharmacologically potent form of ketamine available. S-ketamine is the active ingredient in Spravato — the nasal spray approved by both the FDA and Health Canada for treatment-resistant depression — and produces approximately twice the potency of R-ketamine at equivalent doses due to its stronger affinity for NMDA receptors.
At Psychedelics Canada, our S-Ketamine is independently lab-tested for enantiomeric purity and compound concentration before every batch ships. Discreet Canada Post Xpresspost delivery to every province and territory across Canada.
What Is S-Ketamine Canada?
S-Ketamine Canada (esketamine) is one of the two enantiomers of ketamine — the (S) mirror-image form that carries approximately 3–4x higher affinity for the NMDA receptor than R-ketamine. This greater receptor affinity translates to stronger dissociative effects and faster, more potent anaesthetic and antidepressant activity at lower doses. It is the same compound used in Health Canada-approved ketamine therapy clinics under the brand name Spravato.
S-Ketamine vs R-Ketamine vs Racemic Ketamine
| S-Ketamine | R-Ketamine | Racemic (Standard) | |
|---|---|---|---|
| Potency | Highest | Lower | Intermediate |
| NMDA receptor affinity | 3–4x higher than R | Baseline | Mixed |
| Dissociative intensity | Strongest | Gentler | Standard |
| Antidepressant onset | Fast — hours to days | Potentially slower but longer | Standard |
| Clinical approval | Yes — Spravato (FDA/Health Canada) | Research phase | Off-label use |
S-Ketamine Canada Effects
- Powerful dissociation — A strong separation of mind from body and ordinary perception — more intense than equivalent doses of R-ketamine or racemic ketamine
- Rapid antidepressant effects — Mood improvement often apparent within hours of administration — the basis of its clinical approval for treatment-resistant depression
- Anxiolytic effects — Significant reduction in anxiety, rumination, and intrusive thoughts
- Analgesic effects — Powerful pain relief — ketamine’s original clinical application
- K-hole potential at high doses — At higher doses, complete dissociation from external reality — the “k-hole” state
Dosage Guide — S-Ketamine Canada
| Level | Dose | Route | Effects |
|---|---|---|---|
| Sub-anaesthetic / therapeutic | 0.25mg–0.5mg per kg | Intranasal | Antidepressant, anxiolytic — mild dissociation |
| Low recreational | 25mg–50mg | Intranasal | Mild-moderate dissociation, mood lift |
| Moderate | 50mg–100mg | Intranasal | Strong dissociation, visual phenomena |
| High (K-hole) | 100mg+ | Intranasal | Complete dissociation — experienced users only |
S-ketamine is approximately twice as potent as R-ketamine by weight. If transitioning from racemic ketamine, use approximately half your usual dose as your starting point. Read our harm reduction resources before use.
Duration and Onset
- Onset (intranasal): 5–15 minutes
- Peak: 15–30 minutes
- Total duration: 45–90 minutes
- Antidepressant effects: May persist days beyond the acute experience
Critical Harm Reduction
- Never use S-ketamine alone. A sober sitter is essential at moderate to high doses.
- Never combine with alcohol, benzodiazepines, or opioids. Potentially fatal respiratory depression risk.
- Bladder health is a serious concern. Chronic ketamine use causes ketamine-induced uropathy — a severe, potentially irreversible bladder condition. Use infrequently and stay well hydrated.
- High abuse potential. S-ketamine’s potency and rapid onset create significant psychological dependence risk. Use strictly for therapeutic purposes with adequate spacing between sessions (minimum 1 week).
- Never drive. Effects can persist as impairment long after subjective effects resolve.
Read our complete harm reduction resources before purchasing.
Lab Results
Every batch is independently tested for enantiomeric purity and compound concentration. View our lab results here.
Packaging and Delivery
- Packaging: Sealed, plain unmarked outer packaging
- Shipping: Canada Post Xpresspost — tracked and insured
- Delivery time: 2–5 business days nationwide
- Payment: Interac e-Transfer, Bitcoin, Ethereum
Frequently Asked Questions
Is S-ketamine the same as Spravato?
Yes — Spravato (esketamine) is the pharmaceutical brand name for S-ketamine nasal spray, approved by Health Canada for treatment-resistant depression. Our S-Ketamine is the same compound in a different format.
How much less S-ketamine should I take compared to racemic ketamine?
S-ketamine is approximately twice as potent as racemic ketamine. Start at 50% of your usual racemic ketamine dose and adjust from there.
Is ketamine legal in Canada?
S-Ketamine Canada is a Schedule I controlled substance in Canada. Our products are sold for research and harm reduction purposes only.
Disclaimer: Ketamine is a Schedule I controlled substance under Canada’s Controlled Drugs and Substances Act. Sold for research and harm reduction purposes only. Never combine with alcohol or CNS depressants. Read our harm reduction resources before purchasing.



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