Neem is a medical tree. It is referred as Azadirachta indica in biological terms and in English language it is commonly known as margosa tree. It is very popular and well known herb. This tree belongs to mahogany family Meliaceae. It is worshipped as a god in some parts of the country. It has grown for thousands of years. Its leaves, fruits and even fruits had been used to prepare medicines to treat several small and several severe diseases.