Amines are a common functional group found in many drugs due to their ability to form hydrogen bonds and interact with biological molecules.

Drug metabolism is the process by which a drug is converted into a form that can be more easily eliminated from the body.

Oral administration is the most common route of drug administration due to its ease and convenience.

Drug-receptor binding is the term for the interaction between a drug and a receptor.

G-protein coupled receptors are a common type of drug receptor due to their involvement in a wide range of physiological processes.

Drug distribution is the process by which a drug is distributed throughout the body.

Oxidation is a common type of drug metabolism reaction due to the presence of various enzymes in the body that can catalyze oxidation reactions.

Drug excretion is the process by which a drug is eliminated from the body.

Renal excretion is the most common route of drug excretion due to the kidneys' role in filtering waste products from the blood.

Quantitative structure-activity relationship is the study of the relationship between chemical structure and biological activity.

Ligand-based drug design is a common type of drug design approach that involves the identification of small molecules that bind to a target protein.

Lead optimization is the process of optimizing the properties of a drug candidate to improve its potency, selectivity, and other desirable characteristics.

Animal studies are a common type of preclinical study used to evaluate the safety and efficacy of a drug candidate before it is tested in humans.

Phase I is the first phase of clinical trials, which involves testing the safety of a drug candidate in a small group of healthy volunteers.

Allergic reaction is a common type of adverse drug reaction that can range from mild to severe.