Botanical Name: Solanum nigrum L.
Family: Solanaceae.
Synonyms: Significant scientific synonyms include Solanum rubrum Mill. and Solanum ptychanthum Dunal. In Ayurvedic literature, it is often called Kakamata, Rasayana-vara, and Sarvatikta, reflecting its status as a superior rejuvenative and its bitter nature.
Vernacular Names: The plant is widely recognized as Makoi (Hindi), Black Nightshade (English), Kakamachi (Bengali), Manathakkali (Tamil), and Kamanchi (Telugu).
Classification: In terms of habit, Kakmachi is an annual or short-lived perennial herb. Within the Solanaceae family, it is characterized by its small stature and its production of nutrient-rich, dark berries.
Habitat: Native to Eurasia but now pantropical in distribution, it is found throughout India as a common weed. It thrives in nitrogen-rich soils, cultivated fields, road-sides, and shady waste lands, preferring moist and temperate to tropical environments.
Morphology: The plant typically reaches a height of 30–90 cm. It features an erect, branched stem that can be smooth or slightly hairy. The leaves are ovate or oblong, with wavy or toothed margins. The flowers are small and white with a prominent yellow center (stamens), arranged in drooping umbel-like cymes. The fruit consists of small, globose berries that transition from green to a shiny purplish-black (or occasionally red) when fully ripe.
Useful Parts: The whole plant (Panchanga) is used medicinally, with particular emphasis placed on the leaves and the ripe fruits.
Chemical Composition: The plant contains several biologically active glycoalkaloids, most notably solamargine, solasonine, and solanine. It is also rich in steroidal saponins (diosgenin), polyphenols, and flavonoids like quercetin. The berries provide a significant amount of Vitamin C and anthocyanins, which contribute to its antioxidant profile.
Pharmacological Action: Kakmachi is primarily valued for its hepatoprotective, diuretic, and anti-inflammatory actions. It is a premier remedy for liver cirrhosis, jaundice, and hepatomegaly. It also exhibits expectorant properties for respiratory issues and alterative actions for chronic skin diseases like psoriasis and eczema. Additionally, its antioxidant properties make it effective in managing cardiac stress and edema.
Formulation/Usage: Traditional applications involve the use of Kakmachi Arka (distilled essence) for liver disorders. Freshly expressed juice (Swarasa) of the leaves is often used topically for skin inflammations or taken internally to treat mouth ulcers. It is a key ingredient in many proprietary Ayurvedic liver tonics. The berries are sometimes consumed as a nutritional tonic to improve eyesight and general vitality.
Rasa: Tikta.
Guna: Laghu and Snigdha
Virya:Anushna
Vipaka: Katu