Stages of developing drug from medicinal plants.

 At first selection the plant. Then identification this plant with the necessary chemicals. when identified it, then extraction it. Then we have to detach biological activities. Fraction of the crude extract Physico-chemical procedure and Monitored by biological test, identification and separation of the active fraction.then isolation the active Constituents by the chromatography. Then we need to test the pharmacological toxicity and determine the chemical structure. In the last step, we have to produce an appropriate dosage form of the drug.