Complete dosage information for A-PHP — threshold, light, common, strong, and heavy dose ranges across 3 routes of administration.
Full A-PHP profileImportant Safety Notice
Dosage information is for harm reduction purposes only. Individual sensitivity varies greatly. Always start with the lowest effective dose and work your way up slowly. Never eyeball doses — use a milligram scale.
## Overdose and Medical Emergencies **Alpha-pyrrolidinohexiophenone (A-PHP)** is a potent synthetic cathinone that acts as a dopamine-norepinephrine reuptake inhibitor with significant abuse potential and a narrow margin of safety. Overdose and acute toxicity represent serious medical emergencies that require immediate intervention. ### Stimulant Psychosis A-PHP is strongly associated with **stimulant psychosis**, particularly during binge use patterns. Symptoms include intense paranoid ideation, persecutory delusions, auditory and visual hallucinations, extreme agitation, and disorganized or aggressive behavior [1]. Psychotic episodes may persist for hours to days after last use and are more likely with repeated dosing, sleep deprivation, and escalating doses. Unlike cocaine psychosis, synthetic cathinone-induced psychosis may be more prolonged and resistant to resolution [1]. ### Cardiovascular Emergency Acute A-PHP toxicity produces a **sympathomimetic toxidrome**: severe tachycardia (heart rates exceeding 150 bpm), marked hypertension, chest pain, palpitations, and diaphoresis [2]. The most dangerous cardiovascular complications include cardiac arrhythmia, myocardial infarction, and pulmonary edema — which are among the primary causes of cathinone-related fatalities [2]. Chest pain in the context of A-PHP use should always be treated as a potential cardiac emergency. ### Hyperthermia Hyperthermia is a critical and potentially lethal complication of A-PHP overdose. Core body temperatures can rise above 40 degrees C (104 degrees F), triggering a cascade of rhabdomyolysis, disseminated intravascular coagulation, renal failure, and multi-organ dysfunction [2]. Environmental factors (hot settings, physical exertion) dramatically increase risk. ### The Binge-Crash Cycle A-PHP's short duration of action (1-3 hours) and intensely reinforcing properties promote compulsive re-dosing and extended binge sessions. Users may consume dozens of doses over 24-72 hours, progressively escalating amounts as acute tolerance develops [1]. The subsequent crash involves extreme exhaustion, depression, anhedonia, and intense cravings — frequently triggering another binge cycle. ### When to Seek Emergency Care Seek immediate emergency medical attention for: chest pain or pressure, heart rate above 150 bpm, body temperature above 39.5 degrees C (103 degrees F), seizures, loss of consciousness, severe agitation or psychosis with violent behavior, difficulty breathing, or dark-colored urine (a sign of rhabdomyolysis) [2]. ## References [1] Zawilska JB, Wojcieszak J. alpha-Pyrrolidinohexanophenone (alpha-PHP) and alpha-Pyrrolidinoisohexanophenone (alpha-PiHP): A Review. Life (Basel). 2024;14(4):429. [2] Prosser JM, Nelson LS. The toxicology of bath salts: a review of synthetic cathinones. Journal of Medical Toxicology. 2012;8(1):33-42.
A common insufflated dose of A-PHP is 5–15 mg.
The threshold dose for A-PHP via insufflated is approximately 0.5 mg.
A-PHP typically lasts 2–5 hours via insufflated.
A-PHP can be taken via insufflated, oral, smoked. Each route has different dosage ranges and onset times.
