All parts of Neem tree, root, stem, branches, twig, leaf, flowers, fruits, seeds, neem oil, gum, etc. have medicinal properties.
Medicinal activity of Neem is so diverse and it is used extensively in the traditional system of medicines of India such as Ayurveda, Siddha, Unani and the local health traditions. Therapeutic activities of Neem claimed in Ayurveda, Siddha and Unani include anti-inflammatory, concoctive, blood purifier, anti-leprosy and anti-vitligo, anti-flatulent, wound healing, antiseptic, anti-arthritic, anti-malarial, anti-diabetic, anti-pyretic, anti-helmintic, anti-fertility, anti-viral, anti-ulcerogenic, anti-histamine, immunostimulant and adoptogenic etc Many of these claims have been pharmacologically investigated and found to be valid in Ayurveda and Unani systems.
Neem is used exclusively (neem oil or neem seed oil or other parts of the Neem tree) or in combination with other medicinal plants in preparing a wide range of herbal drugs. During the ethanobotanical investigations carried out earlier, we have collected information on over 160 applications of Neem singly or in combination with other medicinal plants in treating a variety of human aliments. The classified Materia medica of Ayurveda, Siddha and Unani together record over 475 medicinal applications mostly in poly-herbal formulations and also as single plant remedies. It is important to subject these ethnomedicinal information to scientific scrutiny and develop standard products based on promising leads from the above said traditional medicines.