Cyclopentyl-Fentanyl
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 1 source
- no dose data
- 19 combo interactions documented
- classified Tentative
- classified Research-chemical
- 1 source
- no dose data
- 19 combo interactions documented
- classified Tentative
- classified Research-chemical
Aliases: Cp-f, cpf
Summary
Cyclopentylfentanyl is a fentanyl analogue and a full ฮผ-opioid agonist, with published receptor pharmacology (EC50 around 13 nM, ~92% efficacy). It has been identified in fatal overdose casework. No human dose is established, and it should be assumed to carry fentanyl-scale lethality โ active in micrograms, with respiratory depression as the mechanism of death. Naloxone works but repeat doses are commonly required.
Effect Profile
class estimateScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- No reports exist for this substance. Its effect list is the one shared by 2 other substances of the same class, so the scores below describe the class, not this compound.
- Weighted by importance: core (×3), major (×2), minor (×1)
Moderate euphoria with mild itching/nausea, low sedation
Tolerance
Tolerance Decay
Acute tolerance: develops within a single session โ the reset numbers above apply after sustained heavy use, not after one binge. Within-session tachyphylaxis usually resets largely overnight.
Effects
- Stimulation
- Motor impairment
- Increased heart rate
- Insomnia
- Nausea
- Vasoconstriction
- Restlessness
- Sedation
- Decreased appetite
- Reduced anxiety
- Euphoria
- Cognitive euphoria
- Wakefulness
- Empathy
- Anxiety
- Confusion
- Compulsive redosing
- Time distortion
- Talkativeness
- Increased music appreciation
- Color enhancement
- Brightened colour
- Tactile enhancement
- Light sensitivity
- Disinhibition
- Appetite suppression
- Dehydration
- Dulled perception
- Drifting
Combinations
Cross-Check Cyclopentyl-Fentanyl with another substanceHelpful Links
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