Drug discovery and development process can be divided into two major stages: drug discovery which involves isolation of the active constituent, purified, and standardized. The second major stage, drug development, starts with a solitary compound, which at that point progresses through different studies intended to support its endorsement as a new drug. The new drug will then be formulated as an appropriate pharmaceutical dosage form.Pharmaceutical product is medicine intended for human or veterinary use in cure, alleviation, prevention or diagnosis of disease. The use of ineffective, harmful or poor-quality drugs will cause health hazards and waste of funds.