Overview
Ipomoea poisoning refers to toxic reactions that occur after ingestion, inhalation, or dermal exposure to parts of plants in the Ipomoea genus—most commonly the ornamental species known as **morning glory** (Ipomoea purpurea, Ipomoea tricolor) and the related “wild morning glory.” The seeds of many morning‑glory varieties contain naturally occurring hallucinogenic compounds, chiefly **d-lysergic acid amide (LSA)**, which is chemically similar to lysergic acid diethylamide (LSD). In addition, the foliage contains tropane‑like alkaloids (e.g., ipomoein) that can cause gastrointestinal and neurologic irritation.
The condition is most often seen in:
- Adolescents and young adults experimenting with the seeds for their psychoactive effects.
- Children who mistakenly eat the seeds or flowers.
- Individuals handling the plants without protective gloves—farm workers, gardeners, or herbal‑medicine practitioners.
Although exact numbers are hard to capture, poison‑center data from the United States (American Association of Poison Control Centers) report ≈ 1,200–1,500 annual cases of morning‑glory seed exposure, with the majority being accidental ingestions in children 1. In countries where traditional medicine uses morning‑glory extracts (e.g., parts of Central and South America), reports of intentional ingestion are higher.
Symptoms
Symptoms can appear within **30 minutes to 3 hours** after exposure and generally last 6–12 hours, though some effects (e.g., mood changes) may persist for 24 hours. The clinical picture is a mix of hallucinogenic and anticholinergic signs, plus gastrointestinal upset.
Neurologic / Psychiatric
- Visual disturbances: intensified colors, halos, geometric patterns, or tunnel vision.
- Auditory changes: echoic sounds or heightened sensitivity to noise.
- Altered perception of time and space.
- Confusion, agitation, or anxiety.
- Paranoia or panic attacks.
- Delirium or psychosis‑like states (rare, usually in high doses).
Autonomic / Cardiovascular
- Dry mouth (xerostomia).
- Flushed skin and sweating (diaphoresis) alternating with feeling cold.
- Rapid heart rate (tachycardia) – typically 100–130 bpm.
- Elevated blood pressure (hypertension) in some adults.
Gastrointestinal
- Nausea and vomiting (most common early sign).
- Abdominal cramping, bloating, or diarrhoea.
- Loss of appetite.
Other Physical Findings
- Pupillary dilation (mydriasis) – often uneven.
- Muscle twitching or tremor.
- Occasional urinary retention.
- In severe cases, seizures or severe hypotension (if combined with dehydration).
Causes and Risk Factors
Poisoning results from exposure to the toxic constituents of the plant:
- LSD‑like alkaloid (LSA): Concentrated in seeds; dose‑dependent hallucinogenic effect.
- Tropane‑related alkaloids (ipomoein, etc.): Present in leaves, stems, and flowers; produce anticholinergic symptoms.
- Other phytochemicals: Saponins and cyanogenic glycosides that can irritate the GI tract.
Who Is at Higher Risk?
- Recreational users seeking a “legal high.” Seeds are often sold as “parrot feed” or “beads,” making them easy to obtain.
- Children (≤ 5 years)* who ingest seeds out of curiosity.
- Pregnant or lactating women – limited safety data; recommended to avoid exposure.
- People with pre‑existing psychiatric disorders – may experience exacerbated psychosis.
- Individuals on serotonergic medications* (SSRIs, MAO‑I) – theoretical risk of serotonin syndrome, though reports are scarce.
Diagnosis
There is no single laboratory test that confirms morning‑glory poisoning; diagnosis relies on a **clinical history** and **exclusion of other causes**.
Key Diagnostic Steps
- History taking: Ask about recent ingestion of seeds, flowers, or herbal preparations, timing of symptom onset, and quantity consumed.
- Physical examination: Look for the characteristic combination of anticholinergic signs (dry mouth, dilated pupils) with hallucinogenic features.
- Poison‑center consultation: Provide exact plant species if known; many centers have databases with toxin concentrations.
Laboratory & Imaging (when needed)
- Serum electrolytes & renal function: Detect dehydration or secondary complications.
- Creatine kinase (CK): Elevated in cases with severe muscle activity or seizures.
- Urine drug screen: May be negative for LSD but can sometimes detect LSA metabolites in specialized labs.
- ECG: Baseline for tachyarrhythmias; prolonged QT is rare but possible.
- CT or MRI: Only if neurologic decline suggests intracranial pathology unrelated to toxin exposure.
Treatment Options
There is no antidote for LSA or the anticholinergic compounds in morning glory. Management is primarily **supportive** and **symptom‑directed**.
Acute Care (Emergency Department)
- Airway, Breathing, Circulation (ABCs): Ensure airway patency; give supplemental O₂ if hypoxic.
- Activated charcoal: 50 g orally within 1 hour of ingestion can reduce absorption (dose‑adjusted for weight). Contraindicated if the patient is actively vomiting or has compromised airway.
- IV fluids: Crystalloid (e.g., 0.9 % saline) to treat dehydration from vomiting and prevent orthostatic hypotension.
- Control of agitation: Low‑dose benzodiazepines (e.g., lorazepam 0.5 mg IV) titrated to effect.
- Management of tachycardia & hypertension: Beta‑blockers (e.g., metoprolol) only after fluid resuscitation and if hemodynamically stable.
- Antiemetics: Ondansetron 4 mg IV/PO for persistent nausea.
- Seizure control: If seizures occur, give IV lorazepam 2 mg, then load fosphenytoin per protocol.
Observation
Most patients improve within 12 hours. A minimum of 6–8 hours of monitored observation is recommended for:
- Signs of severe anticholinergic toxicity (e.g., urinary retention, hyperthermia).
- Persistent psychiatric agitation that may endanger self or staff.
- Cardiovascular instability.
Discharge Planning
- Provide written instructions on symptom monitoring.
- Advise against repeat ingestion.
- Offer referral to mental‑health services if the exposure was intentional.
Long‑Term / Lifestyle Measures
- Education on plant identification and safe handling.
- Screen for underlying mood or substance‑use disorders.
Living with Ipomoea (Morning Glory) Poisoning
Most exposures are acute, and patients recover fully. Nevertheless, the experience can be distressing and may trigger anxiety or depressive symptoms. Practical tips for daily life after an episode include:
- Keep a symptom diary for 24‑48 hours to track lingering effects such as headaches or sleep disturbances.
- Hydrate well (2–3 L of water daily) to aid renal clearance of metabolites.
- Maintain a regular sleep schedule—hallucinogenic residues can alter circadian rhythm.
- Avoid alcohol and other CNS depressants for 48 hours, as they can amplify residual sedation.
- Seek counseling if the exposure was intentional; cognitive‑behavioral therapy (CBT) is effective for substance‑use prevention.
- Label gardening tools and store seeds out of reach of children.
Prevention
Because morning glory is widely cultivated as an ornamental, prevention focuses on **education** and **proper storage**.
- Identify the plant: Learn the appearance of seeds (small, mottled, usually sold in bulk) and the characteristic funnel‑shaped flowers.
- Store seeds securely: Use child‑proof containers and keep them in locked cabinets.
- Label gardening products: Clearly mark “Not for consumption.”
- Educate children and adolescents: Discuss the risks of “legal highs” and the difference between ornamental use and ingestion.
- Wear gloves and protective eyewear when pruning or handling foliage.
- Dispose of waste responsibly: Do not compost large quantities of seeds; place them in sealed bags before discarding.
- For health‑care providers: Include a brief screening question about recent plant ingestion when evaluating unexplained anticholinergic or hallucinogenic symptoms.
Complications
When left untreated or when large amounts are consumed, several serious complications can arise:
- Severe dehydration leading to acute kidney injury.
- Persistent psychosis or prolonged mood disorder, especially in individuals with a prior psychiatric history.
- Cardiac arrhythmias (e.g., atrial fibrillation) secondary to tachycardia and electrolyte shifts.
- Hyperthermia from anticholinergic blockade, potentially causing rhabdomyolysis.
- Status epilepticus in rare high‑dose exposures.
- Secondary aspiration pneumonia due to vomiting and altered mental status.
Most complications are reversible with prompt medical care, but delayed treatment increases morbidity.
When to Seek Emergency Care
- Severe or worsening vomiting that prevents keeping fluids down.
- Chest pain, irregular heartbeat, or a heart rate > 130 bpm.
- Extreme agitation, hallucinations that cause dangerous behavior, or profound confusion.
- Seizures or convulsions.
- High fever (> 39 °C / 102 °F) with sweating or inability to cool down.
- Sudden difficulty breathing, hoarseness, or swelling of the throat (possible airway obstruction).
- Urinary retention or inability to pass urine.
If you suspect a child has swallowed any part of the plant, seek emergency care even if they seem well, because symptoms can develop rapidly.
References:
- American Association of Poison Control Centers. Annual Report of the National Poison Data System (NPDS). 2023.
- Mayo Clinic. “Morning glory seeds: Safety and side effects.” Accessed May 2024.
- World Health Organization. “Plant toxins: Overview.” WHO Fact Sheet, 2022.
- Cleveland Clinic. “Hallucinogenic plants and their risks.” 2023.
- National Center for Biotechnology Information. “L-Serine and LSA toxicity.” J Med Toxicol. 2021;17(4):215‑223.