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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Non-Standardized Plant Allergenic Extract [EPC]
Strychnine is a highly potent, crystalline alkaloid historically derived from the seeds of the Strychnos nux-vomica tree. While classified under various EPCs, it is primarily recognized in modern medicine as a lethal neurotoxin and glycine antagonist.
Name
Strychnine
Raw Name
STRYCHNINE
Category
Non-Standardized Plant Allergenic Extract [EPC]
Drug Count
13
Variant Count
20
Last Verified
February 17, 2026
About Strychnine
Strychnine is a highly potent, crystalline alkaloid historically derived from the seeds of the Strychnos nux-vomica tree. While classified under various EPCs, it is primarily recognized in modern medicine as a lethal neurotoxin and glycine antagonist.
Detailed information about Strychnine
This page is for informational purposes only and does not replace medical advice. Consult a qualified healthcare professional before using any medication containing Strychnine.
Strychnine is a highly potent, colorless, bitter, crystalline alkaloid that has historically occupied a complex position in the annals of pharmacology and toxicology. Derived primarily from the seeds of the Strychnos nux-vomica tree, native to India and Southeast Asia, strychnine is one of the most bitter substances known to man. In a clinical and regulatory context, Strychnine is categorized under several Established Pharmacologic Classes (EPCs), including Non-Standardized Plant Allergenic Extract [EPC], Non-Standardized Food Allergenic Extract [EPC], and surprisingly, within certain historical or specific regulatory datasets, it has been associated with classes such as Androgen [EPC] and Vitamin C [EPC]. However, it is imperative to understand that in modern medicine, strychnine is not an FDA-approved therapeutic agent for systemic human use due to its extremely narrow therapeutic index and high potential for lethality.
Historically, in the late 19th and early 20th centuries, strychnine was used in very small doses as a stimulant and 'tonic' for various ailments, including gastrointestinal disorders and respiratory failure. It was even used as a performance-enhancing drug in early athletic competitions. Today, its primary non-medicinal application is as a pesticide, specifically a rodenticide for controlling birds and gophers. From a clinical pharmacology perspective, strychnine belongs to the class of spinal stimulants and convulsants. It works by interfering with the inhibitory neurotransmission in the spinal cord and brainstem, leading to uncontrolled muscle contractions. Your healthcare provider will likely never prescribe strychnine for a standard medical condition, as the risks far outweigh any purported benefits.
The mechanism of action for strychnine is well-defined in toxicological literature. At the molecular level, strychnine acts as a potent, competitive antagonist at the glycine receptor (GlyR). Glycine is a major inhibitory neurotransmitter in the central nervous system (CNS), particularly in the spinal cord and brainstem. By binding to these receptors, strychnine prevents glycine from exerting its inhibitory effects on postsynaptic neurons.
When glycine is blocked, the 'brakes' of the nervous system are effectively removed. This results in the over-excitation of motor neurons, leading to severe, involuntary muscle contractions and tetanic convulsions. Although the prompt mentions Ammonium Ion Binding Activity [MoA] and Androgen Receptor Agonists [MoA], these are non-standard descriptions for strychnine's primary toxicological profile. The primary clinical concern is the glycine antagonism which leads to the characteristic 'spinal convulsions' where even a minor sensory stimulus (like a loud noise or a touch) can trigger a massive, painful muscle spasm.
Understanding how the body processes strychnine is critical for managing cases of accidental exposure or poisoning.
There are currently no FDA-approved therapeutic indications for strychnine in humans. Historically, it was included in various 'tonics' and 'bitters' intended to stimulate appetite or treat fatigue. In some international jurisdictions, highly diluted (homeopathic) preparations may exist, but these are not recognized as effective by mainstream clinical pharmacology. Its only widespread modern use is as a restricted-use pesticide (rodenticide). Any medicinal use of strychnine today is considered obsolete and dangerous.
In a clinical or laboratory setting, strychnine may be found as:
> Important: Only your healthcare provider can determine if any substance is safe for your use. Strychnine is a known poison and should never be self-administered.
There is no established safe or therapeutic dose for strychnine in adults. In historical medical texts, doses as low as 1 mg to 3 mg were sometimes cited, but modern clinical consensus identifies these as potentially toxic. The lethal dose (LD50) for an adult is estimated to be between 30 mg and 100 mg, although death has been reported with as little as 15 mg in sensitive individuals. Because the margin between a 'stimulant' dose and a 'lethal' dose is virtually non-existent, systemic administration is contraindicated in all modern medical practice.
Strychnine is not approved for use in children under any circumstances. Children are significantly more susceptible to the neurotoxic effects of strychnine due to their lower body mass and developing nervous systems. Ingestion of even minute amounts (e.g., from old pest control products) is a medical emergency.
In individuals with impaired kidney function, the clearance of strychnine is significantly reduced. This leads to a rapid accumulation of the toxin in the blood, increasing the risk of prolonged convulsions and death. There is no 'safe' adjustment; the substance must be avoided entirely.
Since the liver (specifically CYP2B6) is responsible for the detoxification of strychnine, patients with cirrhosis or hepatic failure are at extreme risk. Reduced metabolic capacity means that even sub-lethal doses can become fatal.
Elderly patients often have reduced physiological reserves and are more likely to experience cardiovascular collapse or respiratory failure if exposed to strychnine. Polypharmacy in the elderly also increases the risk of dangerous drug interactions.
Strychnine should never be taken. If you encounter a product containing strychnine (such as an old tonic or a pesticide):
This section is not applicable as strychnine is not a prescribed medication. If you are using a non-standard extract and miss a dose, do not double the dose, as this could lead to fatal toxicity.
Strychnine overdose is a catastrophic medical emergency.
> Important: Follow your healthcare provider's dosing instructions for any prescribed medication. Do not adjust your dose without medical guidance. Strychnine exposure requires immediate hospitalization.
Because strychnine is a potent toxin, 'side effects' are essentially the early stages of poisoning. Even at extremely low levels, the following are common:
> Warning: Stop taking any substance you suspect contains strychnine and call your doctor immediately if you experience any of these.
If a person survives a significant strychnine poisoning event, they may face long-term health challenges:
While strychnine does not have a modern FDA 'Black Box' warning in the traditional sense (as it is not an approved drug), the Environmental Protection Agency (EPA) and the CDC maintain the highest level of toxicity warnings for this substance.
Report any unusual symptoms to your healthcare provider or local poison control center immediately.
Strychnine is one of the most dangerous alkaloids known to medical science. Every patient and caregiver must understand that there is no 'safe' medicinal use for this substance in modern healthcare. If you have been exposed to strychnine, time is of the essence. The progression from mild muscle twitching to fatal respiratory arrest can occur in minutes.
No FDA black box warnings for Strychnine exist because the drug is not FDA-approved for human therapeutic use. However, it is classified by the CDC as a 'Category B' bioterrorism agent potential due to its high toxicity and ease of dissemination.
In cases of exposure, the following lab tests are mandatory:
Under no circumstances should anyone who has been exposed to even trace amounts of strychnine drive or operate machinery. The risk of sudden, involuntary muscle spasms makes these activities life-threatening.
Alcohol must be strictly avoided. Alcohol can depress the central nervous system in a way that may initially mask strychnine symptoms, but it also increases the risk of respiratory failure and complicates the medical management of poisoning.
Since strychnine is not a chronic medication, there is no tapering requirement. However, survivors of poisoning must be monitored for weeks for delayed neurological or renal complications.
> Important: Discuss all your medical conditions with your healthcare provider before starting any new treatment, and report any accidental poison exposure immediately.
Strychnine does not typically interfere with standard blood chemistry panels, but its effects (like rhabdomyolysis) will cause massive elevations in Creatine Kinase (CK) and Myoglobin. It may also cause a false positive in certain older, non-specific alkaloid screening tests.
For each major interaction, the mechanism is usually either pharmacodynamic (additive effects on the CNS) or pharmacokinetic (interference with the CYP2B6 metabolic pathway). The clinical consequence is almost always an increased risk of toxicity or death.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking. Strychnine has no place in a modern medicinal regimen.
Strychnine is absolutely contraindicated in the following scenarios:
> Important: Your healthcare provider will evaluate your complete medical history before prescribing any treatment. Strychnine is considered a hazardous substance, not a medication.
Strychnine is classified as a high-risk toxin during pregnancy (comparable to Category X). It readily crosses the placenta. Because it causes violent uterine contractions and systemic maternal hypoxia (lack of oxygen), it almost always results in fetal demise or miscarriage. There is also evidence from animal studies of direct teratogenicity (birth defects) affecting the development of the nervous system.
Strychnine is lipophilic and is known to pass into breast milk. A nursing infant would be exposed to the toxin, which could lead to sudden infant death or severe neurological damage. Breastfeeding is strictly contraindicated if there is any suspicion of maternal strychnine exposure.
Strychnine is never approved for use in children. Historically, accidental poisonings in children occurred due to the use of strychnine-coated 'sugar pills' for pest control. Children exhibit symptoms much faster than adults and have a much higher mortality rate. Any child suspected of ingestion must be taken to a pediatric intensive care unit (PICU) immediately.
In older adults, the risk of strychnine toxicity is compounded by:
As the kidneys are responsible for excreting up to 20% of unchanged strychnine, renal failure leads to a rapid 'recycling' of the toxin in the blood. Dialysis has not been proven to effectively clear strychnine fast enough to prevent death, although it may be used as supportive care for secondary kidney failure.
Patients with a Child-Pugh score of B or C have significantly reduced CYP2B6 activity. Since this enzyme is the primary defense against strychnine, these individuals are at the highest possible risk for fatal outcomes from minimal exposure.
> Important: Special populations require individualized medical assessment. Strychnine is a life-threatening hazard to all, but especially to the vulnerable.
Strychnine's primary molecular target is the alpha-1 subunit of the glycine receptor (GlyR) located in the inhibitory synapses of the spinal cord and brainstem. It acts as a high-affinity, competitive antagonist. By occupying the glycine binding site, it prevents the opening of the chloride channel associated with the receptor. This prevents the hyperpolarization of the postsynaptic neuron, effectively lowering the threshold for neuronal firing. The result is a state of generalized CNS disinhibition.
The dose-response relationship for strychnine is exceptionally steep, meaning a very small increase in dose can lead to a massive increase in toxic effect. The onset of effect is rapid (15-30 minutes), and the duration of effect can last up to 24 hours if the patient is successfully stabilized. There is no evidence of tolerance development; rather, repeated exposures may have a cumulative effect due to the slow clearance of the alkaloid.
| Parameter | Value |
|---|---|
| Bioavailability | >90% (Oral) |
| Protein Binding | ~15% - 25% |
| Half-life | 10 - 12 hours |
| Tmax | 0.5 - 1.0 hours |
| Metabolism | Hepatic (Primary: CYP2B6) |
| Excretion | Renal (10-20% Unchanged) |
Strychnine is classified as a Convulsant Alkaloid. Within the EPC framework, it is labeled as a Non-Standardized Plant Allergenic Extract [EPC]. It is pharmacologically related to other alkaloids like brucine, though strychnine is significantly more potent.
Common questions about Strychnine
In modern times, Strychnine has no approved medical uses in humans and is primarily utilized as a restricted-use pesticide, specifically for controlling rodents like gophers and birds. Historically, it was used in very small doses as a stimulant or 'tonic' in the 19th and early 20th centuries, but this practice was abandoned due to its extreme toxicity. Some non-standardized plant extracts may contain trace amounts for research purposes, but these are not for general health. It is never prescribed by doctors today for any standard illness. Its primary presence in the world today is as a dangerous poison.
The most common 'side effects' of Strychnine are actually the early warning signs of poisoning, which include intense muscle stiffness in the neck and jaw, twitching, and heightened sensitivity to light and sound. As the toxicity progresses, patients experience severe, painful muscle spasms and 'risus sardonicus,' a fixed grinning expression caused by facial muscle contractions. These symptoms can escalate within minutes to full-body convulsions where the spine arches violently. Because the patient remains fully conscious during these events, the experience is described as excruciatingly painful. Any of these signs require immediate emergency medical intervention.
No, you should never ingest Strychnine, and drinking alcohol would only make a dangerous situation much worse. Alcohol can depress the central nervous system, which might mask the early signs of Strychnine poisoning, leading to a delay in seeking life-saving treatment. Furthermore, both substances can affect respiratory function, and combining them significantly increases the risk of fatal respiratory arrest. Alcohol also puts additional strain on the liver, which is the organ responsible for detoxifying Strychnine. There is no safe way to combine these two substances.
Strychnine is extremely dangerous during pregnancy and is considered a potent teratogen and abortifacient. It causes violent uterine contractions that can lead to immediate miscarriage or stillbirth. Furthermore, the drug crosses the placenta and can cause fatal convulsions in the fetus or severe developmental defects if the fetus survives. For the mother, the physiological stress of Strychnine exposure during pregnancy is often fatal. There is no safe amount of Strychnine for a pregnant woman or her unborn child.
Strychnine works very rapidly, with symptoms typically appearing within 15 to 60 minutes after ingestion or inhalation. The speed of onset depends on the dose and the route of exposure, with inhalation and injection being the fastest. Once the symptoms begin, they can progress to life-threatening convulsions in a matter of minutes. Because of this rapid onset, there is very little time to administer supportive care. If you suspect exposure, you must not wait for symptoms to appear before calling emergency services.
Strychnine is not a medication that people take on a chronic basis, so 'stopping' it usually refers to ending an accidental or intentional exposure. There is no withdrawal syndrome because the body does not develop a dependence on Strychnine; instead, it is a toxin that must be cleared from the system. If someone survives an acute poisoning, they do not need to taper off the substance, but they do need long-term medical monitoring. The goal is always to have zero Strychnine in the human body. Any use should be ceased immediately and medical help sought.
Since Strychnine is not a prescribed medicine, there is no such thing as a 'missed dose' in a therapeutic sense. If you are participating in a clinical trial involving a non-standardized extract and miss a scheduled administration, you should contact the study coordinator immediately. Never try to 'make up' the dose by taking two at once, as the difference between a trace amount and a lethal amount of Strychnine is incredibly small. For the general public, the only safe dose of Strychnine is no dose at all.
There is no evidence that Strychnine causes weight gain. In fact, historically, it was sometimes used in 'tonics' that were thought to increase metabolism or appetite, which could theoretically lead to weight changes, but these effects were never scientifically proven. In cases of acute or chronic low-level poisoning, the extreme stress on the body and the frequency of muscle contractions would more likely lead to weight loss and physical exhaustion. Weight gain is not a recognized clinical feature of Strychnine pharmacology.
Strychnine has dangerous, often fatal interactions with many other medications, particularly those that affect the central nervous system. It should never be taken with stimulants, antidepressants, or any drug that lowers the seizure threshold, as this will trigger convulsions much faster. It also interacts with drugs metabolized by the liver's CYP2B6 enzyme. Because Strychnine is a poison and not a drug, there are no 'safe' combinations. Always provide your doctor with a full list of your medications if you suspect you have been exposed to any toxin.
Strychnine is not available as a generic medication because it is not an approved drug for any medical condition. While the chemical compound itself is not under patent and can be manufactured for research or industrial (pesticide) use, you cannot purchase it at a pharmacy. Any product marketed as 'medicinal strychnine' is likely an unapproved, unregulated, and potentially illegal substance. In the United States and most other countries, its sale is strictly controlled under pesticide and poison regulations.