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 |
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track Ethchlorvynol there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
⬇ Download import file
Import this file as custom substances
and you get "Ethchlorvynol (Substance Search)" with every
route's full dose ladder and timeline, no typing. Works on iOS and
Android (v15+); the format is confirmed by the app's
developer. The manual values below work for older
versions.
Name
Ethchlorvynol
Unit
mg
Description
Ethchlorvynol Source: SubstanceSearch (substancesearch.com) Oral dose (mg): light 100-200 · common 200-500 · strong 500-750 · heavy 750+ Oral duration: onset 15-45m · peak 6-9h · total 6-9h · after-effects 1-6h Note: ranges are harm-reduction guidance, not a prescription. Start low, go slow, and test your substances.
Tip: for quicker logging you can also add a Custom Unit in the app, e.g. common dose ~ 350 mg (Oral).
The app keeps custom substances simple, so the full dose ranges live in the description text above. Ranges are harm-reduction guidance, not a prescription.
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. Tags summarise each author's own verdict — how reports are classified.
Erowid 2 reports 2 neutral 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
→
Ethchlorvynol's nerd page
Pharmacology, chemical data, effect profiles, and more
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Helpful Links
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