Bencao Gangmu Reference Library
白花曼陀罗 / 洋金花 / 风茄花 / 曼陀罗花 — Datura metel L. / Datura alba Nees
Pinyin: Yáng Jīn Huā / Bái Huā Màn Tuó Luó / Fēng Qié Huā · Malay: Kecubung Putih / Kecubung / Kecubung Corong · Family: Solanaceae (茄科)
Energetics
Warm, Narcotic, Greatly Toxic (温 / 辛温有大毒麻醉定痛平喘)
Flavor
Pungent, slightly bitter, tongue-numbing, narcotic (辛、苦、温、有大毒、麻舌锁喉气烈毒走窜)
Meridians
Lung (肺经), Liver (肝经), Heart (心经)
Traditional Edict
Kecubung Putih (Yang Jin Hua / Bai Hua Man Tuo Luo). Giant celestial white trumpet flower with blunt tuberculate fruit. Supreme Emperor of Herbal Anesthesia and Intractable Asthma Relief (Hua Tuo Ma Fei San / Raja Bius Pembedahan Herba & Ubat Lelah Asma): taking a micro-dose with warm wine produces deep surgical sleep and amnesia, while inhaling a small puff of dried flower smoke expands constricted airways instantly, aborting severe asthmatic attacks within 2 minutes.
Cautions & Contraindications
- BLACK BOX LETHAL ANTICHOLINERGIC TOXIDROME WARNING: Overdose causes fatal delirium, dilated pupils, hyperthermia, coma, and respiratory arrest. Antidote: immediately administer Physostigmine salicylate (1.0 to 2.0 mg IV) or Pilocarpine nitrate. Absolutely contraindicated in glaucoma, prostatic hypertrophy, tachycardia, hypertension, and pregnancy.
Clinical Applications
- Herbal surgical anesthesia and analgesic pre-medication (Ma Fei San formulation); severe spastic bronchial asthma and chronic obstructive pulmonary disease (COPD); organophosphate and nerve agent poisoning resuscitation; spastic gastrointestinal colic and motion sickness.
Quality Markers
Mechanism & Phytochemistry
Scopolamine (>= 0.20%-0.40%) competitively blocks central and peripheral muscarinic acetylcholine receptors (M1-M5); centrally it crosses the BBB to inhibit cortical M1 receptors, producing sedation, anterograde amnesia, and surgical analgesia; peripherally it blocks M3 receptors in airway smooth muscle and submucosal glands (IC50 = 0.85 uM), producing rapid bronchodilation and halting secretions.
Preparation & Dosage
Dried flowers in decoction: STRICTLY 0.15 to 0.30 g (150 to 300 mg) per dose (absolute maximum 0.60 g daily). Asthmatic cigarette inhalation: STRICTLY 0.10 to 0.20 g dried shreds smoked (1-2 puffs). Purified scopolamine hydrobromide: 0.3 to 0.5 mg. Raw seeds strictly forbidden for unguided use.
Appended Prescriptions
- 1. The Sovereign Acute Asthmatic Spasm Relief Powder (Yang Jin Hua Ping Chuan San / 洋金花平喘止咳散): Yang Jin Hua 0.2 g, Pi Pa Ye 1.0 g, Licorice root 0.5 g ground to fine powder; take 0.3 g with warm water at onset of wheezing. 2. The Severe Traumatic Agony & Sprain Deadening Poultice (Tampal Kebas Sakit Kecubung): Fresh Kecubung Putih leaves 10 g, Fresh Ginger 10 g, Virgin coconut oil 5 mL pounded into a paste; apply strictly over intact skin (never open cuts).
Yemama Apothecary · Petaling Jaya, Malaysia · For educational and clinical reference only
