Ketamine
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- Threshold: 10-15 mg
- Light: 15-30 mg
- Common: 30-75 mg
- Strong: 60-125 mg
- K-hole: 100-250 mg
Onset 5 to 15 minutes; duration 45 to 60 minutes with aftereffects 1 to 3 hours. The "K-hole" -- a state of profound dissociation and anesthesia-adjacent experience -- is a recognized category in ketamine harm-reduction literature, distinct from the "strong" tier in
character as well as magnitude.- Threshold: 40-50 mg
- Light: 50-100 mg
- Common: 75-300 mg
- Strong: 200-450 mg
- K-hole: 500+ mg
Onset 5 to 20 minutes depending on stomach contents; duration approximately 90 minutes with aftereffects 4 to 8 hours. Oral doses
are substantially higher than insufflated for equivalent effect.- Threshold: 10-15 mg
- Light: 15-30 mg
- Common: 25-50 mg
- Strong: 40-100 mg
- K-hole: 60-125 mg
- Anesthetic: 100-200 mg
Onset 1 to 5 minutes; duration 30 to 60 minutes with aftereffects 2 to 4 hours. Erowid also notes IV anesthetic dosing at 1-4.5 mg/kg
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- ↑ 1.0 1.1 1.2 Erowid. Ketamine Dosage. Erowid.org. https://www.erowid.org/chemicals/ketamine/ketamine_dose.shtml. Accessed 2026-05-26.