Datura
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Datura (Datura stramonium L., Solanaceae) — jimson weed, thorn apple — is a flowering plant whose seeds and leaves contain tropane alkaloids. Its primary psychoactive constituents are scopolamine and hyoscyamine, unrelated chemically to serotonergic psychedelics. These alkaloids block acetylcholine throughout the brain and body, collapsing cognition, perception, and autonomic regulation.[1]
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atropine, scopolamine (pharmaceutical), diphenhydramine +1 moreatropine, scopolamine (pharmaceutical), diphenhydramine, other muscarinic antagonists show less
The genus Datura has been used across South Asia, the Americas, and Africa for millennia[2] — the name derives from the Sanskrit dhattura.[3] In 1676, British soldiers in Jamestown, Virginia consumed Datura accidentally and were incapacitated for eleven days.[4] Today the plant is largely unscheduled internationally, while its alkaloids are WHO-listed medicines used as antispasmodics and antiemetics.[5]
Subjective effects include profound delirium, fully realistic hallucinations across all senses, dense amnesia, and complete loss of awareness that one is intoxicated. This is not a perceptual overlay — it is a total cognitive collapse in which hallucinations are indistinguishable from reality.[1] Physical effects include tachycardia, dry mouth, urinary retention, and rising body temperature, persisting 12–48 hours.[6]
Physical dependence is rare, but toxicity risk is extreme — the gap between a psychoactive dose and a lethal one is very narrow.[7] Alkaloid concentrations vary dramatically across plants, species, and plant parts, making dose prediction from raw material impossible.[8][9] No controlled human studies of Datura plant material exist — all toxicity data comes from poisoning case series.
History[edit]
Traditional and historical use
Datura use spans millennia across South Asia, the Americas, and Europe.[3] In India, Datura metel appears in Ayurvedic texts and was associated with the deity Shiva;citation needed Native American groups including the Chumash and Zuni used related species in initiatory rituals and vision quests.citation needed In Haiti, Datura preparations were documented as a component of ethnopharmacological "zombie powder" — Wade Davis's 1980s fieldwork brought this use to scientific attention.[2]
Western discovery and pharmaceutical history
"Jimsonweed" derives from "Jamestown weed" — British soldiers consumed Datura in 1676 and were incapacitated for eleven days.[4][3] Commercial anti-asthmatic cigarettes containing D. stramonium leaves (Asthmador brand) were widely abused for psychoactive effects through the mid-20th century.[6] Pharmaceutical scopolamine has since shown rapid antidepressant effects in clinical trials for major depressive disorder,[10] and in 2020 both alkaloids were synthesized in yeast, removing dependence on plant cultivation entirely.[5]
Criminal use
Datura has been used as a tool for criminal incapacitation, exploiting the rapid onset of confusion and amnesia produced by anticholinergic toxicity. A 2016 forensic case documented homicidal administration of Datura in a drink, resulting in death from cardiac arrhythmia.[11] A 2025 review of 114 poisoning case reports identified criminal administration as a recurring category alongside accidental ingestion and recreational misuse.[4]
Botanical Overview[edit]
Datura is a genus in the nightshade family (Solanaceae), closely related to Solanum.[12] The most widely encountered species is D. stramonium (jimson weed); D. innoxia, D. metel, and D. wrightii are also found across various regions. All species contain tropane alkaloids capable of producing anticholinergic toxicity.
D. stramonium grows as a weed across temperate and subtropical regions on every inhabited continent, thriving in disturbed soils, roadsides, and waste ground.citation needed It is not commercially cultivated for psychoactive use; encounters are typically accidental or ornamental.
The plant reaches 0.5–1.5 m in height, with large coarsely toothed leaves that smell unpleasant when crushed. Flowers are white to pale violet trumpets, 6–9 cm long, opening in the evening; the fruit is a spiny capsule — the "thorn apple" — that splits at maturity to release small dark seeds.citation needed Seeds and flowers carry the highest alkaloid concentrations, while leaves and stems contain lower but still pharmacologically significant amounts.[8]
Alkaloid Profile[edit]
Datura contains two primary tropane alkaloids: scopolamine and hyoscyamine. Scopolamine crosses the blood-brain barrier more readily than hyoscyamine, making it the more potent central agent.[13] Both block muscarinic acetylcholine receptors throughout the brain and body, generating the full anticholinergic syndrome.[13][1]
atropine — the racemic mixture form of hyoscyamine — appears in trace amounts in fresh plant material and increases during drying and storage. Minor alkaloids including norhyoscyamine and meteloidine exist in various Datura species but contribute minimally to overall effect.citation needed The Asthmador anti-asthma cigarette formulation contained approximately 50.4% scopolamine and 4.5% atropine by alkaloid weight,[3] illustrating how skewed the alkaloid ratio can be across preparations.
Alkaloid concentrations vary dramatically across species, plant organs, geographic location, season, and growing conditions.[8] A batch of seeds from one plant may contain several times more alkaloid than an identical mass from another specimen of the same species. No standardized potency measure exists for any raw Datura preparation.
Neuroscience[edit]
Where it acts
Scopolamine and hyoscyamine block muscarinic acetylcholine receptors throughout the brain. Blockade in the hippocampus and cortex disrupts memory encoding and retrieval, producing the characteristic dense amnesia.[14] At higher doses, widespread cortical blockade produces full delirium — hallucinations, profound disorientation, and complete loss of reality contact.[13]
What it changes
Anticholinergic delirium is fundamentally different from serotonergic psychedelic experiences. Hallucinations are fully realistic and externally projected — the affected person cannot recognize them as drug-induced.[1] Outside the brain, blockade removes the normal brake on heart rate (causing tachycardia), suppresses secretions and gut movement (dry mouth, urinary retention), and prevents sweating — allowing dangerous rises in body temperature.[15][14]
No neuroimaging studies using Datura plant material have been published. The mechanism by which muscarinic blockade generates complex, fully realistic hallucinations — rather than simple perceptual distortion — remains poorly understood. Whether scopolamine-to-hyoscyamine ratio differences across species produce qualitatively distinct delirium subtypes has not been systematically investigated.
Subjective Effects[edit]
The Datura experience is anticholinergic delirium — a global disruption of cognition, orientation, and reality discrimination that bears no resemblance to serotonergic psychedelic states. Hallucinations span visual, auditory, and tactile modalities and are experienced as indistinguishable from reality. Dense amnesia typically blankets the intoxication period, leaving little or no retrievable memory afterward.
The closest pharmacological comparison is Atropa belladonna (deadly nightshade), which contains the same tropane alkaloids and produces an identical syndrome. The experience has no meaningful overlap with classical psychedelics such as psilocybin or LSD, dissociatives such as ketamine, or empathogens such as MDMA. It is most accurately described as a toxic delirium with hallucinatory features — not a psychedelic or entheogenic state.
Effect Grid
No common recreational dose exists for Datura. The concept of a predictable, tolerable dose range does not apply to this substance. In a case series of 29 intentional ingestions (Rodgers 1993), reported amounts ranged from "a few seeds" to half a cup — all patients developed anticholinergic syndrome with mydriasis, tachycardia, flushing, and hallucinations.
At doses producing the characteristic delirium, effects include external hallucinations indistinguishable from reality, dense amnesia, confusion, motor control impairment, temperature dysregulation, and restlessness. The experience persists 12–48 hours with residual cognitive impairment extending beyond subjective recovery.
Every ingestion at this level carries genuine risk of medical emergency. Fatalities have occurred at doses within the range reported by surviving patients.
Modeled from the effect's dose-dependence curve — not per-substance measurements.
Light sensitivity · Sleep-transition hallucinations · Brightness alteration · Depth perception distortion · Peripheral vision distortion · Taste suppression · Vestibular distortion · Visual drifting · After-images · Auditory distortion · Auditory misinterpretation · Perspective distortion · Proprioceptive distortion · Visual morphing · Touch suppression · Dreaming enhancement · Tinnitus · Touch enhancement · External hallucinations · Shadow people · Auditory hallucinations · Internal hallucinations · Object activation · Object transformations · Visual processing suppression · Olfactory hallucination · Gustatory hallucination
Peripheral vision distortion · Taste suppression · Vestibular distortion · Visual drifting · After-images · Auditory distortion · Auditory misinterpretation · Perspective distortion · Proprioceptive distortion · Visual morphing · Touch suppression · Dreaming enhancement · Tinnitus · Touch enhancement · External hallucinations · Shadow people · Auditory hallucinations · Internal hallucinations · Object activation · Object transformations · Visual processing suppression · Olfactory hallucination · Gustatory hallucination
Constipation · Motor control impairment · Physical fatigue · Restlessness · Dizziness · Heart rate perception changes · Sedation · Appetite suppression · Bodily heaviness · Spontaneous body sensations · Involuntary body movements · Nausea · Sexual arousal suppression · Wakefulness · Trembling · Nystagmus (eye wobbles) · Stimulation · Muscle tension · Seizure threshold reduction · Vomiting · Headache · Insomnia · Respiratory depression · Respiratory stimulation · Tactile hallucination
Dizziness · Heart rate perception changes · Sedation · Appetite suppression · Bodily heaviness · Spontaneous body sensations · Involuntary body movements · Nausea · Sexual arousal suppression · Wakefulness · Trembling · Nystagmus (eye wobbles) · Stimulation · Muscle tension · Seizure threshold reduction · Vomiting · Headache · Insomnia · Respiratory depression · Respiratory stimulation · Tactile hallucination
Confusion · Thought disorganization · Cognitive impairment · Thought deceleration · Cognitive dysphoria · Motivation suppression · Cognitive fatigue · Language suppression · Pattern recognition suppression · Delusions of sobriety · Memory fragmentation · Amnesia · Delirium · Delusions
Thought deceleration · Cognitive dysphoria · Motivation suppression · Cognitive fatigue · Language suppression · Pattern recognition suppression · Memory fragmentation · Amnesia · Delirium · Delusions
Emotional suppression · Emotional lability
Communication suppression · Social disconnection · Depersonalization · Automaticity · Cognitive disconnection · Identity alteration
Cognitive disconnection · Identity alteration
Timeline · by preparation
Preparations[edit]
Raw seed ingestion
Raw seeds are the most commonly reported preparation in poisoning cases and the most frequently associated with fatal outcomes. No reliable dose exists — alkaloid content per seed varies unpredictably across plants and species.[8] Published cases describe ingestion of anywhere from a handful to over 100 seeds, with outcomes ranging from moderate delirium to death.[9] Onset occurs within 30–60 minutes; effects persist 12–48 hours.[6] The delayed peak creates a high risk of additional ingestion before full effects arrive.
Smoked leaf
Dried leaf has been smoked for centuries, most notably as commercial Asthmador anti-asthma cigarettes sold through the mid-20th century.[6] Smoking produces faster onset (minutes) than oral ingestion but delivers an unpredictable alkaloid dose due to variable combustion. Leaf alkaloid content is lower than seeds, though still sufficient to produce full anticholinergic toxicity.
Aqueous decoction (tea)
Tea prepared from leaves, seeds, or flowers is another traditional and contemporary preparation. Steeping time, water temperature, and material quantity all affect alkaloid extraction, adding further unpredictability. Onset and duration approximate those of raw seed ingestion: 30–60 minutes to onset, 12–48 hours total.
Alcohol-based extract
Alcohol extracts (tinctures) extract alkaloids more efficiently than water,[16] producing more concentrated preparations with correspondingly higher overdose risk. Medieval European topical preparations associated with witchcraft used fat-dissolved tropane alkaloids absorbed through the skin.
Onset and intensity differ substantially between preparations — smoking acts within minutes while oral preparations take 30–60 minutes to begin.
Safety[edit]
- Acute toxicity
- Critical
- Chronic toxicity
- High
- Withdrawal
- None
- Tolerance buildup
- moderate
- Tolerance reset
- 10 days
- Physical
- Negligible
- Psychological
- Negligible
- Compulsive redosing
- Negligible
- Dose escalation
- Negligible
- Cross-tol.
- atropine · scopolamine (pharmaceutical) · diphenhydramine
Toxicity
No human lethal dose has been formally established for Datura. An oral dose of approximately 50 mg atropine sulfate may be fatal.[16] The European Food Safety Authority set a combined acute safety limit for hyoscyamine and scopolamine at 0.016 µg/kg body weight;[17] dietary exposure from contaminated grain can reach up to seven times this limit in toddlers.[17]
Documented fatalities include a 58-year-old male who died from accidental foodborne ingestion,[18] a 19-year-old found dead after intentional seed ingestion (postmortem hyoscyamine 1.1 µg/mL, scopolamine 0.2 µg/mL),[9] and a 35-year-old killed after Datura was administered in a drink.[11]
Datura seeds contaminate grain crops including buckwheat, millet, and quinoa. The EU regulates seed presence in animal feeds at a maximum of 1000 mg/kg under Directive 2002/32/EC.[19] Variable potency across species, organs, and growing conditions makes any uncharacterized preparation intrinsically unpredictable.[8]
Psychological Risks
Acute psychosis occurs at toxic doses — documented in 12 of 17 severe cases reviewed at the Swiss toxicology Information Center over 29 years.[20] Dense amnesia is typical; patients rarely recall any of the intoxication period.[6] Residual anxiety, paranoia, and dysphoria may persist after delirium resolves. Risk of accidental self-harm is high due to motor impairment and the inability to distinguish hallucinations from reality.
Children are especially vulnerable — an 8-year-old with accidental ingestion presented with aggression, delirium, and visual hallucinations.[21]
Tolerance & Dependence
No controlled studies on tolerance or dependence for Datura exist. Anticholinergic drugs generally carry low physical dependence potential. Cholinergic rebound effect — sweating, cramping, slow heart rate — has been described on stopping chronic anticholinergic medication use, but is not well-documented for Datura plant exposure specifically.safety citation needed
Psychological dependence is expected to be low. The extreme aversiveness of the experience — amnesia, terror, complete loss of reality contact — discourages repeat use in most individuals.[7] Teen Datura use typically does not escalate to repeated episodes.[15]
Drug Interactions
The most critical interaction is additive anticholinergic burden. Combining Datura with any anticholinergic medication — tricyclic antidepressants, first-generation antihistamines, antipsychotics, bladder antimuscarinics (oxybutynin, tolterodine), or antiemetics (promethazine) — stacks the effects and can be life-threatening. Pharmacovigilance data show at least one anticholinergic drug present in 59.4% of adverse event reports.[22]
CYP3A4 inhibitors — including grapefruit juice, ketoconazole, and erythromycin — slow the body's clearance of scopolamine and hyoscyamine, raising blood levels. Grapefruit juice alone increases scopolamine exposure to approximately 142% of normal.[13]
CNS depressants — alcohol, benzodiazepines, opioids — add to central nervous system depression.[16] Alcohol also extracts more alkaloid from plant material when used as a preparation solvent.
Physostigmine is the specific antidote for severe anticholinergic syndrome, administered intravenously in hospital settings at 1–6 mg.[23][14]
Contraindications
Absolute contraindications:
- Angle-closure glaucoma: pupil dilation from muscarinic blockade can trigger an acute glaucoma crisis — a medical emergency that can cause permanent vision loss.
- Urinary obstruction or benign prostatic hyperplasia: Anticholinergic effects relax the bladder and close the sphincter, causing acute urinary retention.
- Pregnancy: Scopolamine crosses the placenta freely.[13]
Relative contraindications:
- Cardiac disease: Elevated tachycardia and arrhythmia risk; fatal cardiac arrhythmia has been documented in Datura poisoning.[11]
- Elderly individuals: Greater sensitivity to anticholinergic toxicity, including higher risk of falls and cognitive impairment at lower doses.[24]
- Pediatric populations: Children are particularly susceptible — small quantities produce serious CNS symptoms.[21]
- Psychiatric illness: Datura may precipitate or worsen psychotic conditions.[20]
- Users of anticholinergic medications: Additive burden as described under Drug Interactions.
- Hepatic impairment: The liver is the primary clearance route; impairment may increase systemic exposure.safety citation needed
Standard urine drug panels do not detect scopolamine, hyoscyamine, or atropine — targeted GC-MS or LC-MS analysis is required.[9][11]
Harm Reduction[edit]
Forms & Identification
There is no commercially standardized Datura product. All plant-derived preparations — seeds, dried leaves, teas, tinctures — are uncharacterized in terms of alkaloid content unless independently tested. No reagent kit or consumer-grade test exists for tropane alkaloid quantification. There is no reliable way to determine the dose of any Datura preparation before consumption.
Guidelines
- Psychedex does not recommend Datura use in any preparation. No safe recreational dose has been established.
- If exposure occurs or is anticipated: do not use alone under any circumstances. Ensure a sober companion is present for the full duration (up to 48 hours).
- Do not combine with any other anticholinergic medication, alcohol, CNS depressants, or CYP3A4 inhibitors (including grapefruit juice).
- Remove access to vehicles, sharp objects, heights, and open water before onset.
- Maintain access to water and a cool environment — hyperthermia from inability to sweat is a medical emergency.
- Know the nearest emergency department and have transportation arranged in advance.
Set & Setting
Datura eliminates the ability to recognize intoxication, distinguish hallucinations from reality, or make safety decisions. Set and setting precautions that apply to serotonergic psychedelics offer minimal protection against a syndrome that overrides all cognitive self-monitoring. A sober, informed companion present for the full duration is the single most important harm-reduction measure.
Aftercare & integration. Recovery from Datura intoxication may take 24–72 hours. Dense amnesia typically prevents meaningful recall of the experience. Residual effects may include anxiety, confusion, dysphoria, visual acuity suppression, dry mouth, and urinary difficulty for 1–3 days after acute effects resolve.
Hydrate thoroughly. Eat when appetite returns. Rest in a safe, familiar environment. Visual disturbances (pupil dilation, blurred near vision) may persist for 24–48 hours after other effects resolve — avoid driving or operating machinery until vision normalizes.
If persistent psychological distress, paranoia, or psychotic symptoms emerge beyond 72 hours, seek professional psychiatric evaluation.
Recovery & Support
Datura does not typically produce physical dependence, and most individuals do not repeat the experience. If repeated use is occurring despite adverse outcomes, this may indicate a broader pattern of high-risk substance use warranting professional assessment.
For support with substance use concerns, contact:
- SAMHSA National Helpline: 1-800-662-4357 (free, confidential, 24/7)
- Crisis Text Line: Text HOME to 741741
- Poison Control (US): 1-800-222-1222
If Datura exposure was non-consensual (drugging, criminal administration), contact local law enforcement and seek immediate medical evaluation.
Recovery resources, crisis lines, and support pathways → View all
Emergency Response
Recognizing an emergency:
Seek emergency medical attention if any of the following occur after suspected Datura exposure: rapid heart rate, fever or hot dry skin (inability to sweat), seizures, unresponsiveness, severe agitation or aggression, inability to urinate, or loss of consciousness.
Immediate steps:
- 1. Call emergency services immediately (911 / 112 / local equivalent).
- 2. Do not leave the affected person alone — they cannot distinguish hallucinations from reality and are at high risk of self-injury.
- 3. Move them to a cool environment if possible. Apply cool water to skin if body temperature appears elevated.
- 4. Do not attempt to induce vomiting.
- 5. Do not administer activated charcoal unless directed by a medical professional.
What to tell the dispatcher:
State that the person has ingested Datura (jimson weed / thorn apple) plant material. Report the approximate amount consumed, time of ingestion, and current symptoms. Mention any other substances taken. Good Samaritan laws exist in many jurisdictions and provide legal protection when reporting a drug-related emergency.
Reversal agent:
Physostigmine is the specific antidote for severe central anticholinergic syndrome. It is administered intravenously in hospital settings only — it is not available for bystander administration.
Legal Status[edit]
Datura and its primary alkaloids — hyoscyamine, scopolamine, and atropine — are not scheduled under any UN drug control convention. In most countries the plant itself is uncontrolled, while the alkaloids are regulated as pharmaceuticals when sold as medicines.[25] In the United States, Datura is unscheduled at the federal level; Kansas and Nevada have classified D. stramonium as Schedule I, and Louisiana, Connecticut, New Jersey, and Oklahoma impose varying restrictions. Australia schedules it as a nationally prohibited substance. Canada and the United Kingdom do not restrict the plant. India permits common religious and traditional uses. Brazil controls Datura suaveolens specifically. The European Union has no union-wide scheduling but regulates Datura seed contamination in animal feeds under Directive 2002/32/EC.[19] Tropane alkaloids are not structural analogs of any scheduled substance and fall outside analog act provisions in all known jurisdictions.[25]
Legal status changes frequently. This overview reflects the status as of the article's last update and is not legal advice. Verify current law in the relevant jurisdiction before acting on this information.
references
- [1] ^abcdSharma M, Dhaliwal I, Rana K, Delta AK, Kaushik P (2021) Phytochemistry, Pharmacology, and Toxicology of Datura Species—A Review — Antioxidants doi:10.3390/antiox10081291
- [2] ^abAlbuquerque UP et al. (2012) Natural products from ethnodirected studies: revisiting the ethnobiology of the zombie poison — Evidence-Based Complementary and Alternative Medicine doi:10.1155/2012/202508
- [3]
- [4] ^abcAćimović M (2025) Datura stramonium - A Dangerous Weed and Alternative Drug of Abuse: An Overview of Poisoning Cases in 21st Century — Planta Medica doi:10.1055/a-2552-4434
- [5] ^abSrinivasan P, Smolke CD (2020) Biosynthesis of medicinal tropane alkaloids in yeast — Nature doi:10.1038/s41586-020-2650-9
- [6]