Hyoscyamus niger
What's the taxonomical classification of Hyoscyamus niger?
Hyoscyamus niger belongs to the kingdom Plantae and is classified under the phylum Streptophyta. Within this group, it is categorized under the class Equisetopsida and the subclass Magnoliidae. Its taxonomic lineage continues through the order Solanales and the family Solanaceae. Finally, the plant is identified by its specific genus, Hyoscyamus, and its species name, niger.
| Taxonomic Rank | Classification |
|---|---|
| Kingdom | Plantae |
| Phylum | Streptophyta |
| Class | Equisetopsida |
| Subclass | Magnoliidae |
| Order | Solanales |
| Family | Solanaceae |
| Genus | Hyoscyamus |
| Species | niger |
What are the morphological characteristics of this plant?
Hyoscyamus niger has a perennial rootstock with erect, branched stems that reach heights of up to one meter and feature glandular hairs along their surfaces. The leaves are large, ovate, or lanceolate with irregular margins and are arranged alternately along the stem. During its flowering period, the plant produces bell-shaped, yellowish-white flowers that hang downward from the leaf axils. These blossoms are characterized by a prominent, dark-colored eye at the center of the corolla. Following pollination, the plant develops small, smooth, globose fruits that contain numerous tiny seeds.
What is the geographical distribution of this plant?
This plant is native to Europe, North Africa, and Western Asia, though it has become naturalized in many other parts of the world. It thrives in various habitats including waste ground, roadsides, and disturbed soils where sunlight is abundant. Due to its ability to spread, populations are now frequently found in North America and parts of South America. The species prefers temperate climates but can adapt to diverse environmental conditions across different continents. Its global presence is largely a result of human activity and the movement of seeds through various trade routes.
How is this plant cultivated?
This plant, commonly known as black henbane, requires well-drained, nutrient-rich soil and full sun to moderate shade for optimal growth.
It is typically sown directly into the garden in late spring once the danger of frost has passed. Because it is a biennial, it spends its first year forming a basal rosette of leaves before producing flowering stems in the second year. Regular watering is necessary to maintain moisture, though the species is relatively hardy once established.
Caution must be exercised during cultivation because all parts of the plant contain toxic alkaloids.
What parts of this plant are used medicinally?
This plant Hyoscyamus niger contains medicinal alkaloids throughout its flowers, leaves, roots, seeds, and shoots. The leaves and shoots are frequently harvested to extract tropane alkaloids like hyoscyamine for treating gastrointestinal spasms. Doctors also utilize the roots and seeds because they possess a higher concentration of these potent chemical compounds. Even the flowers can be processed to create preparations that act as anticholinergics. Each specific part must be carefully measured to ensure the dosage remains therapeutically effective rather than toxic.
According to a study published by "Lasers in medical science", the leaves, roots, seed, and flowers of Hyoscyamus niger are used to treat a range of diseases by the locals. The elemental analysis of these plant parts was conducted using a 532-nm Nd:YAG laser in an open air environment. The study found silicon (Si), aluminum (Al), iron (Fe), copper (Cu), calcium (Ca), magnesium (Mg), sodium (Na), potassium (K), manganese (Mn), phosphorous (P), and vanadium (V) in the samples. Ca, Mg, Si, and P were detected as primary components, while V, Fe, Mn, Al, and Ti were identified as essential medicinal metals. The PLS-DA classification model with SNV preprocessing achieved an average correct classification rate of 95%.
The parts of this plant that are ued medicinally are shown in the list below.
- flower
- leaf
- roots
- seed
- shoot
What traditional systems uses this plant?
This plant, Hyoscyamus niger, has been utilized in traditional medical systems such as Ayurveda and Traditional Chinese Medicine to manage various physiological ailments. In Ayurvedic practices, components of the plant were historically applied to address specific pain and inflammatory conditions. Traditional Chinese Medicine practitioners also incorporated the plant into their pharmacopeia to treat ailments related to abdominal distress and spasmodic movements. These historical applications relied on the plant's potent alkaloids to exert sedative and antispasmodic effects on the human body. Through these diverse cultural lenses, the species played a significant role in early botanical medicine.
According to a study published by "Journal of AOAC International", Hyoscyamus niger seeds are used as a component in the classical Ayurvedic polyherbal formulation known as Sarpagandha Ghanvati. This specific formulation is prescribed for conditions of insomnia and hysteria and is utilized as an anxiolytic agent. Within the seeds of Hyoscyamus niger, the atropine content was found to be 0.004% w/w. When analyzing 1.0 g of the Sarpagandha Ghanvati preparation, the amount of atropine present was 0.049 mg. The recovery of atropine from this formulation was determined to be 92.45%.
The hystorical systems that uses this plant are shown in the list below.
- Ayurveda
- Traditional Chinese Medicine
What are the pharmacological activities of Hyoscyamus niger?
This plant has potent anticholinergic properties that allow it to function as a powerful antispasmodic and spasmolytic agent for various smooth muscle disorders. By blocking acetylcholine receptors, it effectively inhibits excessive muscle contractions throughout the body. This mechanism also provides significant antisecretary effects by reducing the production of saliva, gastric acid, and other bodily fluids. Additionally, the plant acts as a urinary bladder relaxant to help manage symptoms of overactive bladder or spasms. These diverse pharmacological activities make it a significant subject in medicinal chemistry.
According to a study published by "Fundamental & clinical pharmacology", Hyoscyamus niger exhibits spasmolytic, antidiarrhoeal, antisecretory, bronchodilatory, and urinary bladder relaxant properties. The crude extract of H. niger seeds inhibited contractions induced by carbachool (1 microM) and K(+) (80 mM) by using a combination of anticholinergic and Ca2+ antagonist mechanisms. In guinea-pig trachea and rabbit urinary bladder tissues, Hn.Cr caused relaxation of carbachoel (1 microM) and K(+) (80 mM) induced contractions at concentrations around 10 and 25 times lower than in the gut, respectively. The plant also exhibited antidiarrhoeal and antisecretory effects against castor oil-induced diarrhoea and intestinal fluid accumulation in mice. These pharmacological activities help rationalize the medicinal use of H. niger for treating gastrointestinal and respiratory disorders and bladder hyperactivity.
The primary pharmacological activities of this plant are shown in the list below.
- anticholinergic
- antispasmodic
- antisecretoary
- spasmolytic
- urinary bladder relaxant
What medicinal compounds this plant contains?
This plant contains several potent tropane alkaloids, most notably hyoscyamine, scopolamine, atropine, and anisodamine. These medicinal compounds are primarily utilized for their ability to act as anticholinergic agents in various pharmaceutical applications. Hyoscyamine serves as a foundational component that can be chemically converted into atropine during certain processes. Scopolamine is frequently employed to treat motion sickness and various gastrointestinal spasms. Anisodamine also plays a significant role in treating circulatory issues and specific types of shock.
According to a study published by "Journal of AOAC International", the seeds of Hyoscyamus niger contain atropine. The atropine content in the seeds of Hyoscyamus niger was found to be 0.004% w/w. When analyzing the classical Ayurvedic preparation, 1.0 g of the formulation was found to contain 0.049 mg of atropine. The method used for detection measured atropine at a wavelength of 220 nm. This method demonstrated a 99.46% recovery of atropine when the herb was spiked. The recovery of atropine from the formulation was 92.45%.
The primary medicinal compounds of this plant are shown in the list below.
- Atropine
- Anisodamine
- Hyoscyamine
- Scopolamine
- Tropane alkaloids
What health conditions is this plant used for?
This plant is used for treating bladder hyperactivity, diarrhoea, motion sickness, spasmodic movements, and urinary incontinence. Its active alkaloids act as anticholinergics to relax smooth muscle tissue throughout the body. This mechanism helps to reduce the frequency of painful intestinal contractions associated with digestive distress. Furthermore, the plant's ability to calm muscle spasms makes it effective for managing bladder control issues. These properties collectively allow the plant to address various gastrointestinal and urological ailments.
According to a study published by "Fundamental & clinical pharmacology", Hyoscyamus niger is used for treating gastrointestinal and respiratory disorders as well as bladder hyperactivity. The plant exhibits spasmolytic, antidiarrhoeal, antisecretoary, bronchodilatory and urinary bladder relaxant properties. It shows antidiarrhoeal and antisecretoary effects against castor oil-induced diarrhoea and intestinal fluid accumulation in mice. In guinea-pig trachea and rabbit urinary bladder tissues, the crude extract of Hyoscyamus niger seeds caused relaxation of carbacho1 (1 microM) and K(+) (80 mM) induced contractions. These relaxant effects occurred at around 10 and 25 times lower concentrations in the trachea and bladder respectively than in the gut.
The main health conditions this plant is used for are shown in the list below.
- bladder hyperactivity
- motion sickness
- pain
- spasmodic movements
- urinary incontinence
What are the herbal preparations of this plant?
This plant is Hyoscyamus niger, which is utilized to produce medicinal herbal preparations such as extracts containing hyoscyamine, infusions of dry leaves, liquid drops, and crude extract. These various forms are primarily used to leverage the plant's antispasmodic properties for treating gastrointestinal spasms and cramps. The crude extract provides a concentrated source of alkaloids that can be further refined into standardized medicinal products. Pharmacists and herbalists often prepare infusions of the dry leaves for milder therapeutic applications. Additionally, concentrated drops allow for precise dosing of the potent active compounds found within the plant material.
According to a study published by "Journal of agricultural and food chemistry", phytotoxic extracts were prepared from the seeds of Hyoscyamus niger. Bioassay-guided fractionation of these extracts led to the isolation of 3 new lignanamides and 6 known lignanamides. The structures of these 9 compounds were determined using 1D and 2D nuclear magnetic resonance techniques and high-resolution electrospray ionization mass spectrometry. Bioactivity analysis showed that compound 3 exhibited significant inhibition on germination and radical elongation at a 10(-4) M concentration.
The main herbal preparations of this plant are shown in the list below.
- extracts
- hyoscyamine
- infusions of dry leaves
- drops
- crude extract
What side effects this plant can have?
This plant can cause severe physiological distress including confusion, convulsions, hallucination, mydriasis, and tachycardia due to its high concentration of tropane alkaloids. These toxic compounds act on the nervous system to trigger significant mental disorientation and frightening sensory distortions. Physical symptoms often manifest as extreme dilation of the pupils, a condition known as mydriasis, which can impair vision. The heart rate frequently accelerates into dangerous tachycardia, putting immense strain on the cardiovascular system. In extreme cases of poisoning, the body may suffer from uncontrollable muscle contractions or convulsions.
According to a study published by "Minerva medica", 2 clinical cases of acute voluptuary poisoning occurred from infusions of dry leaves of Hyoscyamus niger. The symptomatology included confusion, visual hallucinations, and a loss of space-time relationships. Neurovegetal symptoms were also present, such as mydriasis, disturbances in visual accommodation, and dryness of the fauces. In 1 case, tachycardia was observed, while bradycardia was noted in the other case. Symptoms were resolved by administration of neuroleptics in 1 case, and spontaneously in the other case after about 12 hours.
The main side effects this plant can have are shown in the list below.
- confusion
- convulsions
- hallucination
- mydriasis
- tachycardia
What herbs are paired with Hyoscyamus niger?
This plant, Hyoscyamus niger, is traditionally paired with herbs such as Valeriana officinalis, Melissa officinalis, and Atropa belladonna to balance its potent anticholinergic effects.
These combinations are often utilized in historical pharmacopeias to manage severe spasms or to enhance sedative properties in topical applications. When used alongside Valeriana, the pairing aims to provide a more comprehensive approach to soothing the central nervous system. Melissa is sometimes included in formulations to mitigate the dryness or cognitive side effects associated with the plant's alkaloids.
Due to the high toxicity of Hyoscyamus niger, these herbal pairings must be approached with extreme caution and scientific precision.