- Drug discovery is a step-wise process that begins with identifying the biological origin of the disease, followed by screening and optimizing chemical candidates.
- The first step is Target Selection, where a biological molecule (usually a protein) involved in a disease is chosen as a potential site for drug action. This target should be validated to confirm its role in the disease.
- The next step is Lead Finding, which involves screening of chemical libraries or natural sources to identify compounds (leads) that show biological activity against the selected target.
- The final step in this sequence is Lead Optimization, where the chemical structure of lead compounds is modified to enhance potency, selectivity, pharmacokinetics, and reduce toxicity.
- Hence, the correct order in the drug discovery process is:
Target Selection → Lead Finding → Lead Optimization = 2-3-1