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Entity
Clonidine
PSX-0138
Open Beta
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Common namesCatapres, Catapres-TTS, Kapvay, Nexiclon XR
Substitutive name2-((2,6-dichlorophenyl)imino)imidazolidine
PsychoactiveDepressant
+1 more
SedativeChemicalArylaminoimidazoline
Threshold
< 25 μg
Light
50 – 75 μg
Common
75 – 100 μg
Strong
100 – 300 μg
Heavy
300+ μg
Onset
15 – 45 min
Peak
60 – 90 min
Offset
6 – 8 hours
Total:6 – 8 hours
minlowmodhigh
Acute
Chronic
Physical
Psych.
Withdrawalnot assessed
Dosage varies by body weight, tolerance & metabolism · Not medical advice · Terms
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Effects (16)
Dependence
not addictive and has a low potential for abuse
experience reports
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First-person accounts of subjective effects, timing, and outcomes — submitted for harm reduction.
Last updated Mar 17, 2026Report an issue