Summary
3F-PiHP is a fluorinated pyrrolidinophenone cathinone structurally related to ฮฑ-PiHP, ฮฑ-PHP, and 3F-PVP. It produces forceful stimulation, sociability, and euphoria but also frequent anxiety, paranoia, and powerful redosing compulsions, especially when vaped or insufflated. First identified in Sweden and Finland in mid-2019; limited pharmacological and toxicological data exist. User reports characterize it as a 'diet' ฮฑ-PiHP with milder rush but similar compulsive redosing tendencies and harsh airway irritation when vaporized. Acetone washing or diluting with 70/30 VG/PG e-liquid can reduce throat burn.
Dose Information
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Comeup | Peak | Offset | After Effects |
|---|---|---|---|---|---|
| Vaporized / Smoked (Free Base) | 0-0 min | 1-3 min | 15-60 min | 1-2 hrs | 2-6 hrs |
| Insufflated | 5-15 min | 5-10 min | 30-60 min | 1-2 hrs | 2-6 hrs |
| Oral | 20-40 min | 20-30 min | 1-2 hrs | 1-2 hrs | 2-6 hrs |
Tolerance
Build-up
develops over days to weeks of regular use
Reset
3โ7 days for acute; 1โ3 weeks for full reset
Effects
Positive
- Stimulation
- Physical euphoria
Negative
- Vasoconstriction
- Teeth grinding
- Bodily tremor
- Increased heart rate
- Insomnia
- Increased perspiration
- Increased blood pressure
- Sweating
Positive
- Cognitive euphoria
- Focus enhancement
- Motivation enhancement
Negative
- Compulsive redosing
- Anxiety
- Paranoia
- Thought disorganization
- Depression
- Irritability
- Thought acceleration
- Ego inflation
Positive
- Increased libido
- Tactile enhancement
- Increased music appreciation
Negative
- Appetite suppression
- Dehydration
- Disinhibition
- Light sensitivity
- Appetite Suppression
- Vibrating vision
- Increase sexuality