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    6-MAM molecular structure

    6-MAM Stats & Data

    6-am 6-acetylmorphine
    PubChem
    MW327.4
    FormulaC19H21NO4
    LogP1.3
    IUPAC[(4R,4aR,7S,7aR,12bS)-9-hydroxy-3-methyl-2,4,4a,7,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinolin-7-yl] acetate
    InChIKeyJJGYGPZNTOPXGV-SSTWWWIQSA-N
    Chemical Class medicine
    Psychoactive Class Depressant
    Half-Life ≈0.36 h (≈21.8 min, terminal t½)

    Pharmacology

    DrugBank

    Toxicity

    PsychonautWiki

    Like many other opioids, unadulterated heroin at appropriate dosages does not cause many long-term complications other than physical and psychological dependence and constipation. Outside of the extremely powerful addiction and physical dependence, the harmful or toxic aspects of opioid usage are exclusively associated with not taking the necessary precautions in regards to its administration, overdosing and using impure heroin products that contain harmful additives. Heavy dosages of heroin can result in severe respiratory depression which can result in dangerous or even fatal levels of anoxia (oxygen deprivation). This occurs because the breathing reflex is suppressed by agonism of µ-opioid receptors - this effect is proportional to the dosage of the substance consumed.

    Addiction & dependence

    As with other opioids, the chronic use of heroin can be considered extremely addictive with a high potential for abuse and is capable of causing psychological and physical dependence among certain users. When psychological or physical addiction has developed, mental and physical withdrawal symptoms and cravings may occur if a person suddenly stops their usage. Tolerance to many of the effects of heroin develops with prolonged and repeated use.

    Effect Profile

    Curated
    Opioid 7.9

    Strong euphoria and pain relief with moderate itching/nausea and sedation

    Euphoria / Warmth×3
    10
    Analgesia×2
    8
    Sedation / Relaxation×1
    6
    Itching / Nausea×1
    7

    Tolerance & Pharmacokinetics

    drugs.wiki
    Half-Life
    ≈0.36 h (≈21.8 min, terminal t½)
    Addiction Potential
    Very high; essentially identical to heroin owing to rapid brain entry and MOR efficacy.

    Tolerance Decay

    Full tolerance 3d Half tolerance 7d Baseline ~10d

    Rapid tolerance accrual with consecutive days of heavy dosing is widely reported. Clinically, overdose risk increases sharply after even brief abstinence due to lost tolerance; take-home naloxone and not using alone are key HR measures.

    Cross-Tolerances

    all μ-opioid agonists
    80% ●○○

    Harm Reduction

    drugs.wiki

    Rarely sold in pure form; most user encounters arise from black-tar heroin or deliberate synthesis. Potency ≈30 % higher than heroin by weight. Extremely short plasma half-life produces a sharp rush but also a steep post-peak crash. Naloxone fully reverses effects. Ethanol slows 6-MAM → morphine conversion, compounding respiratory depression. Modern drug checking programmes repeatedly find high variability in heroin potency, occasional inclusion of other high-potency opioids, benzodiazepine-type drugs, and veterinary tranquilizers (e.g., xylazine); start with a very small dose, avoid polydrug use, and check samples where possible. Fentanyl/‘benzo-dope’/‘tranq-dope’ mixtures raise overdose risk and may require repeated naloxone while providing only partial benefit if non-opioids are present; continue rescue breaths and call emergency services immediately. Naloxone acts within minutes but typically lasts ~20–40 min—renarcotization can occur as morphine levels or other opioids outlast naloxone, so monitor continuously and re-dose if breathing slows. After any abstinence (detox, jail, illness), tolerance drops quickly and overdose risk is markedly higher on prior ‘usual’ doses—halve or more if returning to use, and ideally use with someone who can intervene. For injection: use sterile water, correct acidifiers only when needed (citric/ascorbic for base forms), and avoid vinegar/lemon to reduce infection risk; use clean equipment every time and seek local needle/syringe services for supplies and wound care. For smoking: use foil, test tiny amounts first, and avoid deep sedation alone. Fentanyl test strips can be useful where permitted, but follow instructions carefully—the method and dilution determine reliability.

    References

    Drugs.wiki References

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