Scaphoidhelmet Monkshood Herb — Safety & Interactions
Chuan Xing Wu Tou · Herba Aconiti Navicularis
Contraindicated / High risk. Use only under practitioner supervision.
Contraindications
- Unprocessed (raw) herb for internal use — ABSOLUTELY CONTRAINDICATED; raw aconite has caused numerous documented fatalities
- Pregnancy — embryotoxic and teratogenic; absolutely contraindicated
- Heat patterns, Yin deficiency with Heat, or any condition without clear Cold-Deficiency presentation — hot herb contraindicated
- Concurrent use with cardiac medications without specialist supervision
- Children — no safe dose established
Cautions
- SAFETY-CRITICAL: This herb contains aconitine, mesaconitine, and hypaconitine — one of the most toxic alkaloid groups in Chinese materia medica. The therapeutic window between analgesic and lethal doses is extremely narrow. Internal use MUST involve properly processed herb under experienced practitioner supervision only.
- SAFETY-CRITICAL: Symptoms of aconitine poisoning — numbness and tingling of lips, tongue, and extremities; nausea, vomiting, diarrhoea; hypotension; bradycardia or ventricular arrhythmias; respiratory depression — onset within 30 minutes of ingestion. Seek emergency care immediately.
- Cardiac glycosides (digoxin): additive arrhythmogenic risk; avoid combination
- Antiarrhythmic drugs (amiodarone, flecainide, quinidine): pharmacodynamic interaction — unpredictable cardiac effects
- Beta-blockers: may mask early signs of aconitine-induced tachycardia; combined use may precipitate severe bradycardia
- QT-prolonging drugs: additive risk of fatal ventricular arrhythmia
- Traditional processing (paozhi) for this species: prolonged boiling (minimum 30–60 minutes) or overnight water-soaking followed by decocting is required to hydrolyse aconitine to less toxic benzoylaconine; processed dose typically 1.5–3 g in decoction under supervision
Drug Interactions
| Drug Class / Substrate | Mechanism | Severity | Source |
|---|---|---|---|
| Cardiac glycosides (digoxin) — additive arrhythmogenic effect; contraindicated combination | |||
| Antiarrhythmic drugs (amiodarone, flecainide, quinidine, lidocaine) — unpredictable cardiac pharmacodynamic interaction | |||
| Beta-blockers — may precipitate severe bradycardia; masks tachycardia warning sign | |||
| QT-prolonging medications — additive risk of fatal ventricular arrhythmia | |||
| CNS depressants — additive respiratory depression at toxic doses | |||
Pregnancy
Not recommended during pregnancy. Consult a qualified practitioner before any use.
This information is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before using herbal medicines, especially if you take prescription medications.