Benzylfentanyl
Summary
Benzylfentanyl is a depressant opioid. Reported effects include euphoria, anxiety suppression, muscle relaxation, and compulsive redosing. Limited data is available on its dosage and safety profile.
Effect Profile
Scores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Opioid
5.1
Moderate+
5/10
Strong euphoria with moderate itching/nausea, mild sedation
Euphoria / Warmth
×3
9
physical euphoria
cognitive euphoria
euphoria
Analgesia
×2
0
Sedation / Relaxation
×1
5
sedation
muscle relaxation
Itching / Nausea
×1
6
nausea
constipation
Based on reports from:
Tolerance
Build-up
develops within days of regular use; analgesic tolerance faster than respiratory depression tolerance
Reset
7–14 days for partial reset; full reset may take weeks — tolerance loss greatly increases overdose risk
Tolerance Decay
Full tolerance
1d
Half tolerance
21d
Baseline
~35d
Effects
Positive
- Muscle relaxation
- Physical euphoria
- Anxiolytic
Negative
- Motor impairment
- Respiratory depression
- Nausea
- Sedation
- Sedative
- Itchiness
- Dystaxia
Positive
- Reduced anxiety
- Anxiety suppression
- Cognitive euphoria
- Euphoria
Negative
- Dizziness
- Amnesia
- Motor control loss
- Thought deceleration
- Compulsive redosing
- Constipation
Positive
- Increased music appreciation
- Increased libido
Negative
- Disinhibition
- Appetite suppression
- Dehydration
- Double vision
- Light sensitivity
- Dulled perception
- Internal hallucination
- Internal hallucinations
Combinations
Benzylfentanyl's nerd page
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