alpha-PiHP Stats & Data
CC(C)CC(N1CCCC1)C(=O)c1ccccc1UOZWZANRCOALQL-UHFFFAOYSA-NPharmacology
DrugBankDescription
α-PHiP (also known as α-PiHP), is a stimulant drug of the cathinone class that has been sold online as a designer drug. It is a positional isomer of pyrovalerone, with the methyl group shifted from the 4-position of the aromatic ring to the 4-position of the acyl chain. In a classic 2006 study of pyrrolidinyl cathinone derivatives by Meltzer et al. at Organix, the alpha-isobutyl derivative of pyrovalerone, O-2494, was found to have the highest potency in vitro as an inhibitor of the dopamine transporter of the alpha substituted derivatives tested, however it was not until ten years later in July 2016 that α-PHiP was first identified as a designer drug, when it was reported to the EMCDDA by a forensic laboratory in Slovenia.
Effect Profile
Curated + 2 ReportsModerate stimulation and euphoria with mild sensory enhancement
Strong anxiety/jitters with moderate euphoria and focus, mild stimulation
Tolerance & Pharmacokinetics
drugs.wikiTolerance Decay
Within‑session acute tolerance to euphoria rises rapidly; next‑day effects are often blunted while side‑effects remain. Rough return to baseline sensitivity typically requires 1–2 weeks after heavy use. Data primarily from user reports; individual variability high.
Cross-Tolerances
Experience Report Analysis
ErowidDemographics
Gender Distribution
Age Distribution
Reports Over Time
Harm Reduction
drugs.wikiPotent NPS stimulant of the pyrrolidinophenone family closely related to α‑PVP/α‑PHP; typically appears as white/off‑white powder or crystals. Batch potency varies widely across vendors and time—use a 0.001 g scale, allergy test (≈1 mg), and incremental titration. Vaporization has the fastest onset and the highest redose liability; many users report compulsive re‑hitting leading to binges, sleep loss, and anxiety spikes. Insufflation is commonly described as notably caustic to nasal mucosa, with increasing irritation and nosebleeds across a session; post‑use saline rinses and spacing lines reduce harm. Cardiovascular strain (tachycardia, hypertension), vasoconstriction (cold extremities), hyperthermia with exertion, and severe insomnia are the most common acute risks; avoid heat, hydrate with electrolytes, and rest. If anxious or paranoid, reduce stimulation, cool down, and consider non‑sedating de‑escalation first; if a benzodiazepine is used, avoid redoses and combining with other depressants due to blackout/respiratory risk. Set a pre‑commitment: cap session total and stop‑time to disrupt redosing loops—many binges escalate after the first hour. Adulteration/misrepresentation occurs in street pills/powders; use reagent tests and, where possible, submit samples to a lab‑based drug checking service. Extended binges increase risk of psychosis‑like symptoms; sleep, nutrition, and at least several days of abstinence are protective. Data on human pharmacokinetics is sparse; avoid frequent reuse within the same week to limit tolerance and sleep debt.
References
Drugs.wiki References
- Bluelight – α‑PHiP thread (TripSit dosage repost and discovery notes)
- Reddit – A-PiHP summary/insufflated onset & duration timeline
- Reddit – Insufflation causticity and dosing discussion
- Reddit – Vaping/pyrovalerone binge/addiction cautions
- Reddit – Personal account of severe compulsion with pyros
- Reddit – Benzodiazepine blackout after heavy A‑PiHP
- Erowid – DrugsData project overview (lab drug checking)
- Erowid – alpha‑PHP experiences (related pyrovalerone stimulant)