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Datura

Datura — jimsonweed, thornapple, Datura stramonium and relatives — recurs throughout the dream and ethnobotanical literature because it is historically famous, not because it is usable. This entry exists to warn against it, and the Institute's library records it on no other basis.

What it is

A potent anticholinergic deliriant. The active tropane alkaloids are scopolamine, atropine and hyoscyamine — competitive antagonists at muscarinic acetylcholine receptors, centrally and peripherally.

It does not produce a psychedelic state in the sense the term is normally used. It produces true delirium: full hallucinations indistinguishable from reality, no insight, and amnesia for the episode. People under its effects hold conversations with absent people, walk into traffic and injure themselves without any awareness of being intoxicated.

Why there is no dose here

The tropane content varies enormously — between plants, between seasons, between parts of the same plant, and between individual seeds from a single pod. Reported variation runs by more than an order of magnitude.

The consequence is the whole point: the amount that produces an effect and the amount that kills are close together, and neither can be predicted from the plant. There is no preparation, no dose and no safe amount given here, because for this plant there is no reliable safe amount to give. Where the Institute's source material carried a seed count, that number was removed and the caution kept.

This is the only place in this library where detail is withheld, and the reason is specific rather than precautionary: the detail cannot be made accurate. Everywhere else, withholding preparation and dose information is the harm — here, supplying it would be, because any number given would be wrong for the next plant.

Toxidrome

The classical anticholinergic presentation, worth recognising because someone else may need to:

• Hot as a hare — hyperthermia
• Blind as a bat — mydriasis, paralysed accommodation
• Dry as a bone — no sweat, no saliva
• Red as a beet — flushed skin
• Mad as a hatter — delirium

Plus tachycardia, urinary retention, seizures, coma. Hyperthermia and the injuries sustained during delirium are common causes of death, alongside cardiac effects.

If someone has taken Datura, this is an emergency-department presentation. Treatment is supportive; physostigmine is used in hospital. Benzodiazepines control agitation. It is not something to sit with at home.

Inhalation vs. Oral Ingestion: The Sadhu Tradition and Pyrolysis

While swallowing seeds or drinking seed decoctions is a notorious medical emergency, traditional ethnobotanical systems (specifically Indian Shaivite Sadhus and Aghoris) treat Datura very differently:

• Smoking Leaf Fragments with Charas: Sadhus routinely blend tiny fragments of dried Datura leaf (*Datura metel*) with cannabis resin (charas) and tobacco in a clay pipe (*chillum*).
• Pyrolytic Inactivation: Burning leaf material destroys between 80% and 90% of fragile tropane ester bonds through thermal decomposition before the smoke enters the lungs.
• Instantaneous Pulmonary Titration: Inhaled vapor enters the pulmonary capillary bed with a $T_{\max}$ of seconds. The user receives immediate physiological feedback (slight dryness of mouth, bronchial relaxation) and can immediately set the pipe down. By contrast, swallowing 50 to 150 seeds traps the user in a 2-hour digestive delay before an uncontrollable, 48-hour life-threatening toxic delirium begins.

The Benztropine Model: Micro-Dosing as Antispasmodic Medicine

In clinical medicine, synthetic anticholinergics like benztropine (Cogentin) and trihexyphenidyl (Artane) are prescribed at tiny, precise doses (0.5 mg to 2 mg) to:

1. Balance acetylcholine-dopamine ratios in Parkinson's disease.

2. Abort acute dystonic reactions and extrapyramidal tremors induced by dopamine antagonists (antipsychotics).

3. Inhibit muscarinic $M_3$ receptors in airway smooth muscle to induce bronchodilation (the exact basis of 19th-century "Asthma Cigarettes" made from *Datura stramonium*).

4. Dry excessive salivation and bronchial secretions.

When ascetics micro-dose Datura via smoke, they are utilizing this exact sub-milligram anticholinergic stabilization—counteracting the heavy bronchial secretions, airway constriction, and nausea of potent cannabis resin—completely divorced from the lethal delirium of high-dose seed consumption.

The Shulgin "Tasting" Protocol and Museum Doses

Because botanical potency fluctuates wildly, responsible pharmacological evaluation rejects arbitrary minimum doses. Instead, Alexander "Sasha" Shulgin formalized the "Tasting" Bioassay Protocol in PIHKAL and TIHKAL:

• Sub-threshold Microgram Baseline: Always begin at a fraction of the estimated threshold (10 to 50 micrograms), never jumping to an active dose.
• Full Washout Windows: Allow multiple days between trials to confirm receptor clearance and absence of cardiac or autonomic liabilities.
• Incremental Titration: Step up slowly (micrograms to milligrams) to establish the minimum active baseline.
• The "Museum Level" Dose: As defined in Shulgin's 2C-B research, a museum dose is a gentle threshold (+ or ++) state that sharpens visual contrast, aesthetic appreciation, and sensory lucidity while leaving motor control, cognitive sobriety, and social composure completely intact. In tropane botany, exceeding this threshold into delirium is not an expansion of consciousness, but acute neurotoxic poisoning.

Related

Other tropane-bearing Solanaceae carry the same hazard: Brugmansia (angel's trumpet), Atropa belladonna (deadly nightshade), Hyoscyamus niger (henbane), Mandragora (mandrake). The historical and ritual literature on all of them is genuinely interesting; none of it makes them safe.

Galantamine is the pharmacological opposite — a cholinesterase inhibitor — and appears in the same dream-material list. They are directly antagonistic.

See also: Old World vs. New World Visionary Botanicals: Toxicity, Titration, and the Shulgin Method · Galantamine · Stack Substances · Cannabis Harm Reduction · Virology, Antivenom Immunology, and Aromatic Antimicrobials · Shulgin Rating Scale

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