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    PMA molecular structure

    PMA Stats & Data

    4-ma 4-methoxyamphetamine
    NPS DataHub
    MW185.7
    FormulaC10H16ClN
    CAS41632-56-8
    IUPAC1-(4-methylphenyl)propan-2-amine hydrochloride
    SMILES[Cl-].CC(N)Cc1ccc(C)cc1.[H+]
    InChIKeyKOFSZKDEQWGBDN-UHFFFAOYSA-N
    Phenethylamines; 2020/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2021/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2022/1. Von 2-Phenethylamin abgeleitete Verbindungen
    Chemical Class Opioid
    Psychoactive Class Psychedelic / Stimulant
    Half-Life Unknown in humans; effects commonly persist 6–12+ hours and can be prolonged by delayed onset and potential MAOI-like activity.

    Pharmacology

    DrugBank
    State Solid

    Mechanism of Action

    4-Methoxyamphetamine is a seratogenic drug of the amphetamine class. The drug acts as a potent and selective serotonin releasing agent. It binds to alpha receptors to mediate these effects.

    Receptor Profile

    Receptor Actions

    Inhibitors
    Monoamine oxidase-A inhibitor (reversible)
    Other
    Selective serotonin releasing agent (SSRA)
    Weak dopamine and norepinephrine effects

    Effect Profile

    Curated + 17 Reports
    Psychedelic 4.6

    Moderate visuals with mild auditory effects and body load, low headspace

    Visual Intensity×3
    7
    Headspace Depth×3
    2
    Auditory Effects×1
    4
    Body Load / Somatic Effects×1
    4
    Stimulant 3.8

    Strong anxiety/jitters with moderate stimulation, low euphoria and focus

    Stimulation / Energy×3
    6
    Euphoria / Mood Lift×2
    3
    Focus / Productivity×2
    2
    Anxiety / Jitters×1
    8
    Opioid 2.6

    Mild itching/nausea with low euphoria and sedation

    Euphoria / Warmth×3
    3
    Analgesia×2
    0
    Sedation / Relaxation×1
    3
    Itching / Nausea×1
    4

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    Unknown in humans; effects commonly persist 6–12+ hours and can be prolonged by delayed onset and potential MAOI-like activity.
    Addiction Potential
    Low to moderate for compulsive redosing; dependence uncommon, but binge patterns and psychological compulsion can occur with stimulants.

    Tolerance Decay

    Full tolerance 1d Half tolerance 3d Baseline ~7d

    Data on PMA-specific tolerance are scarce; pattern approximated from amphetamine-like stimulants with serotonergic activity. Anecdotal reports suggest rapid acute tolerance during binges and partial cross-tolerance with MDMA-class agents.

    Cross-Tolerances

    MDMA
    50% ●○○
    MDA
    50% ●○○
    other substituted amphetamines
    30% ●○○

    Experience Report Analysis

    Erowid
    17 Reports
    2000–2009 Date Range
    1 With Age Data
    10 Effects Detected

    Demographics

    Gender Distribution

    Age Distribution

    Reports Over Time

    Effect Analysis

    Erowid

    Effects aggregated from 17 experience reports (17 Erowid)

    17 Reports
    10 Effects Detected
    5 Positive
    2 Adverse
    3 Neutral

    Effect Sentiment Distribution

    Confidence Distribution

    Positive Effects 5

    Euphoria 52.9% 70%
    Anxiety Suppression 47.1% 70%
    Sedation 35.3% 70%
    Color Enhancement 17.6% 70%
    Music Enhancement 17.6% 70%

    Adverse Effects 2

    Nausea 41.2% 70%
    Confusion 17.6% 70%

    Real-World Dose Distribution

    62K Doses

    From 21 individual dose entries

    Form / Preparation

    Most common forms and preparations reported

    Redose Patterns

    Redosing behavior across 10 reports

    0.0% Redosed
    1.0 Avg Doses

    Legal Status

    Controlled internationally under the UN Convention on Psychotropic Substances 1971.
    Country Status Notes
    Australia PMA is considered a Schedule 9 prohibited substance in Australia under the Poisons Standard (October 2015). A Schedule 9 substance is a substance which may be abused or misused, the manufacture, possession, sale or use of which should be prohibited by law except when required for medical or scientific research, or for analytical, teaching or training purposes with approval of Commonwealth and/or State or Territory Health Authorities.
    Austria PMA is illegal to possess, produce and sell under the SMG (Suchtmittelgesetz Österreich) |
    Brazil Possession, production and sale is illegal as it is listed on Portaria SVS/MS nº 344.
    Canada PMA is a Schedule I substance.
    Finland Substance is scheduled in decree of the government on amending the government decree on substances, preparations and plants considered to be narcotic drugs.
    Germany PMA is part of the Appendix 1 of the Betäubungsmittelgesetz. Therefore, owning and distribution of PMA is illegal.
    Netherlands On 13 June 2012 Edith Schippers, Dutch Minister of Health, Welfare and Sport, revoked the legality of PMA in the Netherlands after five deaths were reported in that year.
    Russia PMA is classed as a Schedule I substance.
    Switzerland PMA is a controlled substance specifically named under Verzeichnis D.
    United Kingdom PMA is a Class A drug in the UK.
    United States PMA is classified as a Schedule I hallucinogen under the Controlled Substances Act in the United States.

    Harm Reduction

    drugs.wiki

    Extremely narrow therapeutic index: the gap between a ‘common’ dose and life-threatening toxicity is small. PMA is frequently mis-sold as MDMA in pressed pills or powders, but it has slower onset (often >60 minutes) and less euphoria, prompting risky redosing that has been implicated in clusters of fatalities. Expect marked hyperthermia and hypertension risk; avoid hot environments, prolonged dancing, and strenuous activity. If effects are unexpectedly delayed or atypical for MDMA, do not redose and seek a cool, quiet space. Hydrate with small sips of isotonic fluids (~300 mL/hour) and avoid overhydration. Reagent testing: PMA typically shows no reaction with Marquis/Mecke; PMMA may show a blue Simon’s reaction without MDMA-like Marquis/Mecke changes. Absence of the expected MDMA reaction is a red flag—only lab drug checking (e.g., GC/MS) can confirm composition. Strongly avoid combinations with serotonergic agents (SSRIs, MAOIs, tramadol, dextromethorphan, triptans) and with other stimulants or MDMA, due to serotonin syndrome and hyperthermia risk. Seek emergency help for high temperature, confusion/agitation, severe headache, chest pain, or persistent vomiting. Given its poor safety profile and repeated association with deaths, routine recreational use is not advised.

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