The study of pharmacology focuses on the interactions between drugs and biological systems. It examines the effects of drugs on the body (pharmacodynamics) and how the body processes drugs (pharmacokinetics), including absorption, distribution, metabolism, and excretion. This field is crucial for developing new medications and understanding their therapeutic potential, side effects, and risks. Pharmacology plays a significant role in personalized medicine, guiding treatment decisions based on individual patient profiles, enhancing the effectiveness and safety of drug therapy.