Pharmaceuticals, either natural or synthetic, are important from top to
ground people to survive with care. Traditional medicinal plants are the key for the
synthetic development of any drugs. Synthesis of an efficient drug depends on the
selectivity, affinity, efficiency, metabolic stability, and bioavailability of the
compound. This chapter gives very brief idea about Active Ingredient (AI), API,
Bactericidal, Bacteriostatic, Binders, Cross-screening, Brand, Generic, Effective
Dose Fifty (ED50), Inhibitory Concentration fifty (IC50), Lethal Dose Fifty (LD50),
Drug, Medicine, Broad-Spectrum, Narrow-Spectrum, ADME, DMPK,
Pharmacodynamics, Pharmacokinetics, Pharmacology, Biopharmaceutical, Pro-
Drug, SAR, Synergistic action, in-vitro, in-vivo terms to begin freshly.
Keywords: Drug discovery, Pharmaceuticals, Pharmaceutical chemistry, Pharmacology, Pharmacokinetics.