Detailed chemical and pharmacological aspects of cannabidiol described in this chapter open new gateway for future studies on its therapeutic actions with thorough mechanism.Drugs GPR and GPR, novel molecular targets for cannabidiol.They have been used for treatment of different diseases of human beings worldwide since the beginning of human civilization.Most of the species under this genus are cultivated throughout the tropical and the subtropical agroclimatic zones for medicine and for extraction of essential oils for product development in aromabased pharmaceutical industries.These volatile compounds have a tremendous value in pharmaceutical, modern perfumery and food processing industries.These active ingredients have high international demand for aromabased value additions and product development from essential oils.The genus is very variable and possesses wide range of intra and interspecic genetic diversity. The plants ourish predominantly as herbs and shrubs and usually survive as annuals or perennial plants in habit.They possess glandular hairs or sessile glands secreting strongly scented volatile secondary metabolites in the form of oils.People know the plant as surasah in sanskrit and tulsi in hindi.The tulsi leaves, when consumed, can control thirst and so is invaluable to weary travellers.Phytochemical investigation reveals that they are rich in carbohydrate, bre, phosphorous, calcium, protein, iron, betacarotene, vitamins B and B and in aromatic oils. It is effective against cold and cough, indigestion, stomach pain and diarrhoea.Nausea, ulcers, ringworm and asthma can also be effectively treated by using tulsi ingredients or extract.It is also helpful in lowering blood sugar and increasing lactation. The oil is used as antiperspirant as well as y and mosquito repellent. In future, there will be possibility to develop more varieties of herbs, increase oil yield containing specic chemicals like eugenol, methyl eugenol, germacrene A and D, linalool, elemicin, elmene and. It is used in avour and perfume industry.Essential oil is light yellow with strong odour of camphor.The oil is widely used in perfume, avour and pharmaceutical industry.Essential oil is light yellow and is a rich source of citral.It is used in perfume, avour and cosmetic industries.The oil has been reported to possess potent antibacterial and antifungal activities.Leaves have diaphoretic, stimulant and expectorant properties.Their juice is applied in cold, cough and chest troubles.The plant is stomachic, stimulant, carminative, antipyretic, diaphoretic, expectorant, diuretic and also useful in heart, brain and blood diseases, asthma, inammations and enlarged spleen.The plant has bitter sharp taste and is useful in diseases of brain, heart, liver and spleen, strengths the gums and removes foul breath.It is diaphoretic, stomachic and is good for the treatment of fever.The plant has carminative, stimulant, antipyretic, antifungal and antibacterial properties.After removing of duplicates, genetic stocks were examined for high herbage content and essential oil yield with type of quality during an initial evaluation trial in eld. Essential oil yield, oil content and herb yield were found to vary from. in population. Chemotypes described so far for this species are methyl chavicol, linalool and ocimene. Ocimum ingredients are general vitalizers that increase physical endurance in humans, the reason being it contains no buy Epiandrosterone caffeine or other stimulant.The essential oil compositions of available species of the genus is very much helpful in the pharmaceutical industry and in formulation of drug principles.