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Every plant on the earth has lot of chemicalingredients which have many identical activities on animal body. Human has beenusing various plants as medicine from ancient times. Plants were identified assource of medicine after different type of observations and experiments. Treatmentwith various plants began since the early stage of human civilization (Malik,2001).

It can be traced into ancient documents thatempirical uses of medicinal plants are as old as human civilization (Hamburgerand Hostettmann, 1991). How the plants can be useful and benefited to human is witnessedby the past decade has. Also, they observed that the undesirable side effect ofthe plants as medicine is minor.

So, now-a-days modern people are divertingtheir attention more towards the herbal medicine rather than the syntheticdrugs. These commercial drugs are very expensive to develop as well as containtoxic effect. World Health Organization (WHO) says that approximately70%population of world relies on plant for primal health care. From tropicalplants, more than 50 major drugs are originated in global market (Ghani, 2003).17% of higher plants from about 250,000 species have been investigated for medicalpotential around the world.

The diversity of plants gives a limitless sourcefor the application in the progress of latest drugs. The lead molecules whichare isolated from medicinal plant can act as alternative medicine.The people of underdeveloped continent like Asia,Africa and Latin America are backward and lack inventiveness as well asaccepting western technology and civilization without active response. These3rd world, earn money by importing herbal medicine. Therefore, this medicine isa call to fight against all obstacles (Adodo, 2013).

In South Asia, Bangladeshis a country which is situated on the fertile Bengal delta. The fertile land ofBangladesh made it an excellent source of medicinal plants. 

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