3-Hydroxyphenazepam
Encyclopedic
Encyclopedic
Typical encyclopedia coverage. Cross-reference for important decisions.
- 3 corroborating sources
- partial dose data
- duration data present
- 17 combo interactions documented
- classified Tentative
- classified Research-chemical
- 3 corroborating sources
- partial dose data
- duration data present
- 17 combo interactions documented
- classified Tentative
- classified Research-chemical
Aliases: Hpnz, 3-hop, 3-oh-p, 3ohphenazepam, 3-ho-phenazepam, 3hophenazepam, 3-ho-p, 3hop, 3ohp, 3-oh-phenazepam
Summary
3-Hydroxyphenazepam is a potent designer benzodiazepine and active metabolite of phenazepam and cinazepam. It is 5-10 times more potent than diazepam and has diminished muscle relaxant properties compared to phenazepam while retaining strong sedative and anxiolytic effects. Recreational doses carry high risk of blackouts, amnesia, and respiratory depression, especially when combined with other CNS depressants.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 0.5-1mg | 1-2mg | - | 2-4mg+ |
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | Total |
|---|---|---|---|---|---|
| Oral | 10-60 min | 30-90 min | 2-6 hrs | 4-8 hrs | 10-24 hrs |
Effect Profile
Scores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Strong anxiolysis and euphoria with moderate cognitive impairment, mild sedation
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track 3-Hydroxyphenazepam there, start adding an ingestion, search for the name, and choose to add it as a custom substance. Paste these values:
3-Hydroxyphenazepam Source: SubstanceSearch (substancesearch.com) Oral dose (mg): light 0.5-1 · common 1-2 · heavy 2-4+ Oral duration: onset 0.17-1h · come-up 0.5-1.5h · peak 2-6h · offset 4-8h · total 10-24h · after-effects 1-36h 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 ~ 1.5 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
Tolerance Decay
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.
Benzodiazepine tolerance typically develops within days of frequent use and decays over weeks after cessation. Figures are approximate, based on class-wide patterns and user reports rather than substance‑specific kinetics.
Cross-Tolerances
Effects
- Muscle relaxation
- Anxiolytic
- Muscle Relaxant
- Physical euphoria
- Motor impairment
- Respiratory depression
- Sedation
- Sedative
- Dystaxia
- Hypnotic
- Anxiety suppression
- Cognitive euphoria
- Amnesia
- Motor control loss
- Emotion suppression
- Thought deceleration
- Analysis suppression
- Compulsive redosing
- Dizziness
- Delusions of sobriety
- Increased music appreciation
- Increased libido
- Appetite enhancement
- Disinhibition
- Visual acuity suppression
- Acuity suppression
- Dehydration
- Light sensitivity
- Dulled perception
- Perception of bodily heaviness
Combinations
Cross-Check 3-Hydroxyphenazepam with another substanceHelpful Links
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