Today it is well known that herbal medicines must be used in a specific type of formulation (dosage form) in order to achieve the desired results. By Knowing the formula and physicochemical properties of active chemical substances allow us to establish the best and most appropriate method of extraction, and therefore administration in order to obtain the desired effect which can be used in the treatment of different illnesses. To obtain the therapeutic portion of dosage form from raw materials and to eliminate the unwanted treatment with solvent. They play an essential role in the determination of qualitative and quantitative composition of extracts. The extracts obtained are also utilized for the isolation and characterization of therapeutically active chemical. Let us take some dried leaves (crude drug) in a container, add water in it. The active ingredient will come out in the water. Here water, i.e. the solvent of extraction is called “Menstruum”. Later the water is filtered. The filtrate is known as the “Extract”. The damp crude drugs (damp leaves) are called “Marc”. This marc can be expressed i.e., pressed in a chamber to get the residual liquid, which is mixed with the previous extract.