Simply the best. But first let me give you a background, and I apologize if it sounds like the Res Gestae Divi Augustus, but I have been around. A lot of strands in old Duder's head.
Ethchlorvynol
Well-documented
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 16 combo interactions documented
- PubChem toxicity data
Well-documented
Multiple authoritative sources agree on dosing and effects.
- 2 corroborating sources
- 1 ROA with full dose ladder
- duration data present
- 16 combo interactions documented
- PubChem toxicity data
Aliases: Placidyl, Ethchlorvnol, placdyl
Summary
Ethchlorvynol has been used to treat insomnia. Due to its barbiturate-like problems concerning abuse and overdose, U.S. manufacturers discontinued it in 1999.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 100-200mg | 200-500mg | 500-750mg | 750mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | Total |
|---|---|---|---|
| Oral | 15-45 min | 6-9 hrs | 6-9 hrs |
Tolerance
Build-up
develops over weeks of regular use via CB1 receptor downregulation
Reset
2–4 weeks for most users; heavy users may need longer
Tolerance Decay
Full tolerance
3d
Half tolerance
21d
Baseline
~28d
Acute tolerance: develops within a single session — the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
Positive
- Stimulation
- Physical euphoria
- Muscle relaxation
Negative
- Motor impairment
- Increased heart rate
- Nausea
- Respiratory depression
- Vasoconstriction
- Teeth grinding
- Sedation
Positive
- Reduced anxiety
- Cognitive euphoria
- Euphoria
- Anxiety suppression
Negative
- Compulsive redosing
- Anxiety
- Thought deceleration
- Dizziness
- Amnesia
- Time distortion
Positive
- Increased music appreciation
- Increased libido
- Tactile enhancement
- Color enhancement
Negative
- Disinhibition
- Light sensitivity
- Appetite suppression
- Dehydration
- Double vision
- Dulled perception
Combinations
Cross-Check Ethchlorvynol with another substanceCommunity Trip Reports
Anecdotal first-person accounts from Reddit, Erowid, and Bluelight. Click a source to expand. Reports are harm-reduction context, not medical guidance.
Erowid 2 reports 1 neutral 1 cautionary visit
I was prescribed 30 red gel capsules of Placidyl (Ethchlorvynol) which was meant to be taken at bedtime. I have read about them, but I never tried them out before and I was anxious to sample its effects. Yes, anxious. Even though they were prescribed to me for sleep, I didn't care.
Pill Identifiers
2
known pill identifiers on record — view imprints, colors, shapes, and images
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Ethchlorvynol's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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