Strychnos nux-vomica seeds are an exceptionally potent Chinese herbal medicine with numerous therapeutic effects, such as dispersing blood heat, reducing swelling, and relieving pain. While highly effective, they are also extremely toxic. This herb must be taken strictly according to a doctor's instructions to ensure safe consumption. Below, we detail the specific functions and effects of Strychnos nux-vomica seeds.
I. Composition of Strychnos Nux-vomica:
It contains indole alkaloids with a total alkaloid content of 3%–5%. The primary active component is strychnine (strychnine base), followed by brucine. It also contains trace amounts of various alkaloids, such as α- and β--corubrine, heterostylbamine, pseudostylbamine, pseudomaconin, strychnosine, neomaconine, eculizumab, etc.
II. Effects of Strychnos Nux-vomica:
Strychnos Nux-vomica is bitter, cold in nature, and toxic.It enters the Liver and Spleen meridians. It unblocks meridians, relieves pain by unblocking channels, resolves phlegm and disperses nodules, reduces swelling, and detoxifies. It is primarily used for stubborn rheumatic paralysis, numbness of the skin, limb paralysis, sore throat and epilepsy, trauma injuries with fractures, abscesses and swollen pain; sequelae of infantile paralysis, and rheumatoid arthritis.
III. Functions of Strychnos Nux-vomica:
1. Unblocking Meridians and Relieving Pain
Strychnos Nux-vomica relaxes tendons, promotes blood circulation, dispels cold, and unblocks meridians. It is highly effective for traumatic injuries and abscesses with swelling and pain. It treats stubborn rheumatic paralysis or stiffness and numbness.
2. Reducing Swelling and Dissolving Masses
It treats traumatic bruising, swelling, and pain, as well as abscesses and swellings. It also demonstrates certain efficacy in treating various types of tumors.
3. Eliminating Wind and Dampness
Strychnos seeds also eliminate rheumatic dampness and dispel wind-cold. They are highly effective for rheumatic and rheumatoid arthritis.It is used to treat sequelae of poliomyelitis, lumbar disc herniation, trigeminal neuralgia, rheumatoid arthritis, traumatic injuries with blood stasis pain, wind-cold-damp arthralgia, generalized joint stiffness and numbness, and tumors.
4. Anti-inflammatory and Antibacterial
Strychnos seeds also possess anti-inflammatory properties, demonstrating efficacy in treating non-specific inflammatory conditions such as abscesses and swellings.
6. Promoting Blood Circulation and Tissue Regeneration
Strychnos seeds also exhibit certain effects in treating infantile paralysis, numbness in hands and feet, and cancer resistance.
IV. Pharmacological Effects of Strychnos Seeds:
1. Nervous System Stimulation
Strychnine stimulates the entire central nervous system and enhances the sensory center function of the cerebral cortex.
2. Analgesic Effects
Experiments indicate that the contained hypaconite exhibits analgesic and sedative properties, whereas brucine lacks analgesic effects. In the acetic acid-induced writhing test via intraperitoneal injection in mice, the ED50 for hypaconite's analgesic effect via intramuscular injection was 12.68 mg/kg. The hot plate test in mice confirmed hypaconite's analgesic efficacy.This analgesic effect is associated with M-cholinergic receptors.
3. Causing Asphyxia
Both strychnine and brucine in strychnos seeds are toxic. A single adult dose of 5–10 mg strychnine causes poisoning, while 30 mg proves fatal. Death results from repeated tonic convulsions leading to exhaustion and asphyxiation.
4. Effects on the Digestive System
Direct testing on patient intestinal fistulas demonstrates that strychnine does not stimulate human gastrointestinal smooth muscle. However, its intense bitterness stimulates taste receptors, reflexively increasing gastric secretion, thereby promoting digestive function and enhancing appetite.Animal (sheep) studies further indicate that moderate oral doses of strychnos powder stimulate rumen activity, treating rumen atony; conversely, excessive doses inhibit rumen motility, exacerbating atony.Reports indicate that strychnine alkaloids exhibit potent antitussive effects against coughing induced by ammonia and sulfur dioxide in mice, surpassing the efficacy of codeine. Oral administration demonstrates significantly greater potency than intraperitoneal injection. The phenol red excretion method in mice confirms that strychnine alkaloids at 40 mg/kg possess marked expectorant activity comparable to ammonium chloride, though its bronchodilator effect is relatively weak.Animal studies further indicate that prolonged administration or increased dosage enhances the antihistamine effect in rabbits. 6. Effects on Pathogenic Microorganisms A decoction of Strychnos nux-vomica (1:2) exhibits varying degrees of inhibitory activity against dermatophytes such as Trichophyton rubrum and Microsporum audouinii in vitro.
V. Precautions for Using Strychnos Nux-vomica Seeds:
Strychnos nux-vomica seeds are highly toxic. Overdose easily causes poisoning, initially manifesting as headache, dizziness, and restlessness. This progresses to neck stiffness, generalized muscle rigidity, and even opisthotonos (arching of the back), clenched fists, locked jaw, and a spastic smile.Severe cases may result in unconsciousness, rapid breathing, dilated pupils, irregular heartbeat, and ultimately circulatory failure leading to death. Therefore, proper processing and strict dosage control are essential.