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    4-MPD molecular structure

    4-MPD Stats & Data

    4-methylpentedrone
    NPS DataHub
    MW205.3
    FormulaC13H19NO
    CAS1373918-61-6
    IUPAC(2S)-2-(methylamino)-1-(4-methylphenyl)pentan-1-one
    SMILESCCCC(NC)C(=O)c1ccc(C)cc1
    InChIKeyAKVKBEDACKJNPO-LBPRGKRZSA-N
    Phenethylamines; Cathinones; 2020/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2021/1. Von 2-Phenethylamin abgeleitete Verbindungen; 2022/1. Von 2-Phenethylamin abgeleitete Verbindungen
    Chemical Class Cathinone
    Psychoactive Class Stimulant
    Half-Life Unknown in humans; user‑derived estimates suggest a short elimination phase consistent with ~2–4 h effects ‘legs’.

    Receptor Profile

    Receptor Actions

    Inhibitors
    Dopamine-norepinephrine reuptake inhibitor (DNRI)
    Other
    SERT substrate (partial releaser)

    Effect Profile

    Curated
    Stimulant 2.6

    Strong anxiety/jitters with moderate euphoria, low stimulation

    Stimulation / Energy×3
    3
    Euphoria / Mood Lift×2
    6
    Focus / Productivity×2
    0
    Anxiety / Jitters×1
    10

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    Unknown in humans; user‑derived estimates suggest a short elimination phase consistent with ~2–4 h effects ‘legs’.
    Addiction Potential
    Moderate to high. Short duration and dopaminergic/adrenergic profile encourage redosing; binges and strong craving are commonly reported among cathinone users.

    Tolerance Decay

    Full tolerance 2d Half tolerance 7d Baseline ~14d

    Model is heuristic from stimulant user reports; tolerance rises quickly with consecutive redosing or multi‑day use, then decays over 1–2+ weeks. Cross‑tolerance within cathinones is likely; across classes is partial. Data quality is limited to forum/anecdotal sources.

    Cross-Tolerances

    other cathinones
    60% ●○○
    amphetamine‑type stimulants
    40% ●○○
    dopaminergic stimulants (e.g., methylphenidate)
    30% ●○○

    Harm Reduction

    drugs.wiki

    4‑MPD is the para‑methyl analogue of pentedrone and a higher homologue of mephedrone; like many synthetic cathinones, effects are short‑lived, encouraging redosing. Acute risks include tachycardia, hypertension, hyperthermia, anxiety, and peripheral vasoconstriction; these mirror the sympathomimetic toxicity profile seen with other stimulants. Monitor vitals; stop and cool if temperature rises or if resting HR >120 bpm or BP >140/90 while seated. Avoid polydrug use with MAOIs, serotonergic cough syrups (DXM), or seizure‑threshold‑lowering agents (e.g., bupropion, tramadol). Compulsive administration and binges are widely reported with short‑acting cathinones; set a pre‑commitment plan (total session limit, dose cap, no overnight use) and adhere to minimum 60–90 min redose gaps. Oral dosing is generally safer than vaping or insufflation; if snorting, crush finely, use your own sterile straw, and rinse nose before/after to reduce septal injury. Maintain hydration and electrolytes but avoid overhydration; sip ~250 mL/h when active in hot settings and take cooling breaks. Because supply is unregulated and mis‑selling is common, use professional drug‑checking where available; reagent tests are only preliminary. Avoid use if you have cardiovascular disease, uncontrolled hypertension, hyperthyroidism, or a history of stimulant‑induced psychosis; seek medical help for chest pain, severe headache, confusion, or persistent hyperthermia. Storage: keep dry, cool, and airtight; aqueous solutions of β‑keto compounds can degrade over time. Post‑use low mood, fatigue, and sleep disruption are common; allow multi‑day recovery, nutrition, and sleep; avoid chasing the comedown with depressants.

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