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| Common name | ホミカ(馬銭子), Maqianzi, Strychni Semen (JP18, CP2020), Nux Vomica (JP18, CP2020) | 
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| crude drug image | |  | 
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| Original plant name | Strychnos nux-vomica Linn. | 
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| original plant image |  | 
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| Family name | Loganiaceae | 
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| Used part | mature seed | 
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| Official compendium | JP XVIII, CP (2020 ed.) | 
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| Clinical application | As an amaroid stomachic and painkiller, maqianzi is applied, in forms of extract or tincture, for indigestion and atony of gastrointestinal. | 
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| Medical system | Traditional Chinese medicine | 
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| Drug effect in traditional medicine
 | Traditional classification
 | External drugs | 
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| Beneficial effect | [Property and Flavor] Warm; bitter; highly toxic. [Meridian Tropism] Lung and spleen meridians.
 [Actions] To unblock the collaterals to relieve pain, dissipate bmds and disperse swelling.
 [Indications] Injuries from falls and fights, swelling and pain caused by fracture, wind-dampness stubborn impediment, numbness, paralysis, abscesses and cellulitis, sore and toxin, swelling and sore of throat.
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| Chemical constituent | Lipids (*C1):
 脂肪油/fat oil
 
 Monoterpenoids
 (*C1):
 Loganin
 
 Tannins
 (*C1):
 Caffeetannin
 
 Indole alkaloids
 (*C1):
 Strychnine, Brucine, Vomicine, alpha-Colubrine, beta-Colubrine, Pseudostrychnine, Pseudobrucine, Struxine
 
 
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| Chemical structure |  | 
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| Pharmacological effect | Central excitation (strychnine). | 
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| DNA sequence | L14410 | 
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| Disease | Swelling and pain of joint, Cramp, Numbness, Swelling and pain due to contusion, Swelling and pain of the throat, Pyogenic dermatosis | 
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| Formulation | Nux Vomica Extract, Nux Vomica Extract Powder, Nux Vomica Tincture, Compound Nux Vomica Extract and Diastase | 
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| References | JP18: The 18th edition of the Japanese Pharmacopoeia. CP2020: Pharmacopoeia of the People's Republic of China 2020 edi.
 C1) The Encyclopedia of Wakan-Yaku with Color Pictures Vol. I, pp 331-333.
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| Remarks | Maqianzi is the raw material for strychnine nitrate (central nervous system stimulant). | 
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| Last renewal date | 2021/09/27 | 
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