Neem (Azadirachta indica), Margosa Tree All parts of neem are used for preparing many different medicines, especially for skin disease. Part of the Neem tree can be used as a spermicide Products made from neem have been used in India for over two millennia for their medicinal properties: they are said to be antifungal, antidiabetic, antibacterial, antiviral, contraceptive and sedative