Made the (bad) decision to try this new chemical last year, also my first experience with a strong stimulant (being from the most dangerous class in my opinion), because of pure curiosity.
alpha-PiHP
Limited data
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 3 corroborating sources
- 4 ROAs with full dose ladders
- duration data present
- 18 combo interactions documented
- classified Tentative
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed โ capped
Limited data
Sparse data. Doses and effects may be unreliable or untested.
- 3 corroborating sources
- 4 ROAs with full dose ladders
- duration data present
- 18 combo interactions documented
- classified Tentative
- classified Research-chemical
- dose data not in PW/TripSit (unverifiable)
- dose ladder unverifiable and undisclosed โ capped
Aliases: Pihp, Funky, 4-me-pvp, Alpha-phip, a-pihp
Summary
Alpha-PiHP is a potent synthetic cathinone and positional isomer of alpha-PHP, with significantly higher potency than cocaine and methamphetamine as a dopamine transporter inhibitor. It typically appears as white to off-white powder and is consumed orally, insufflated, or vaporized. The substance has been linked to fatal intoxications and severe adverse effects including cardiac complications, psychosis, and seizures.
Dose Information
| ROA | Light | Common | Strong | Heavy |
|---|---|---|---|---|
| Oral | 5-15mg | 15-30mg | 30-50mg | 50mg+ |
| Insufflated | 3-10mg | 10-25mg | 25-40mg | 40mg+ |
| Vaporized | 2-10mg | 10-20mg | 20-30mg | 30mg+ |
| Vapourized | 2-10mg | 10-20mg | 20-30mg | 30mg+ |
Light
Common
Strong
Heavy
Onset, Duration & After-effects
| ROA | Onset | Peak | Offset | Total |
|---|---|---|---|---|
| Oral | 30-60 min | 1-2 hrs | 2-5 hrs | 3.5-8 hrs |
| Insufflated | 1-2 min | 1-2 hrs | 2-4 hrs | 3.02-6.03 hrs |
| Vaporized | 1 min | 15-30 min | 1-3 hrs | 1.27-3.52 hrs |
| Vapourized | 1 min | 1-3 hrs | - | - |
Effect Profile
2 reportsScores (1–10) curated from multiple sources:
- Effect keyword matching from PsychonautWiki catalog
- Weighted by importance: core (×3), major (×2), minor (×1)
Empathogen
3.4
Light+
3/10
Moderate stimulation and euphoria with mild sensory enhancement
Empathy / Social Openness
×3
0
Euphoria / Mood Elevation
×2
6
euphoria
cognitive euphoria
Stimulation
×1
7
stimulation
wakefulness
teeth grinding
increased heart rate
Sensory Enhancement
×1
5
tactile enhancement
increased libido
Stimulant
5.4
Moderate+
5/10
Strong anxiety/jitters with moderate euphoria and focus, mild stimulation
Stimulation / Energy
×3
5
stimulation
wakefulness
Euphoria / Mood Lift
×2
7
euphoria
cognitive euphoria
motivation enhancement
Focus / Productivity
×2
7
focus enhancement
thought acceleration
motivation enhancement
Anxiety / Jitters
×1
10
anxiety
paranoia
increased heart rate
teeth grinding
vasoconstriction
Based on reports from:
Add to PsychonautWiki Journal
The PsychonautWiki Journal logging app doesn't include every substance. To track alpha-PiHP 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 "alpha-PiHP (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
alpha-PiHP
Unit
mg
Description
alpha-PiHP Source: SubstanceSearch (substancesearch.com) Oral dose (mg): threshold 3-5 ยท light 5-15 ยท common 15-30 ยท strong 30-50 ยท heavy 50+ Insufflated dose (mg): threshold 1-3 ยท light 3-10 ยท common 10-25 ยท strong 25-40 ยท heavy 40+ Vaporized dose (mg): threshold 1-2 ยท light 2-10 ยท common 10-20 ยท strong 20-30 ยท heavy 30+ Vapourized dose (mg): threshold 1-2 ยท light 2-10 ยท common 10-20 ยท strong 20-30 ยท heavy 30+ Oral duration: onset 0.5-1h ยท peak 1-2h ยท offset 2-5h ยท total 3.5-8h ยท after-effects 6-12h Insufflated duration: onset 1-2m ยท peak 1-2h ยท offset 2-4h ยท total 3.02-6.03h ยท after-effects 6-12h Vaporized duration: onset 1m ยท peak 15-30m ยท offset 1-3h ยท total 1.27-3.52h ยท after-effects 6-12h Vapourized duration: onset 1m ยท peak 1-3h ยท after-effects 6-12h 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 ~ 22.5 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
Build-up
develops over days to weeks of regular use
Reset
3โ7 days for acute; 1โ3 weeks for full reset
Tolerance Decay
Full tolerance
1d
Half tolerance
3d
Baseline
~14d
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.
Withinโsession acute tolerance to euphoria rises rapidly; nextโday effects are often blunted while sideโeffects remain. Rough return to baseline sensitivity typically requires 1โ2 weeks after heavy use. Data primarily from user reports; individual variability high.
Cross-Tolerances
Effects
Positive
- Stimulation
Negative
- Increased heart rate
- Increased blood pressure
- Vasoconstriction
- Teeth grinding
- Headache
- Insomnia
- Increased perspiration
- Mouth numbing
- Difficulty urinating
Positive
- Euphoria
- Focus enhancement
- Motivation enhancement
- Cognitive euphoria
- Wakefulness
Negative
- Anxiety
- Paranoia
- Compulsive redosing
- Thought acceleration
- Ego inflation
Positive
- Tactile enhancement
- Increased libido
- Increased music appreciation
Negative
- Disinhibition
- Appetite suppression
- Dehydration
- Light sensitivity
- Spontaneous physical sensations
- Vibrating vision
- Increase sexuality
Combinations
Cross-Check alpha-PiHP 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 1 neutral 1 cautionary visit
Interesting Experience First Time Use (Light Dose) I used to take a lot of stims in my raving year (UK squat part/warehouse/out door scene). I stopped for normal reasons (loosing the plot). Pretty much stopped drugs and am a benzo/opiate addict (getting treatment).
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