A pharmacologist is a scientist who studies how drugs interact with biological systems. They investigate the effects of medications on the body, including how they work, their side effects, and how they can be used to treat diseases. This field combines knowledge from areas like biology, chemistry, and medicine to develop new therapies and improve existing ones. Pharmacologists often work in laboratories, conducting experiments and analyzing data. They may collaborate with other professionals, such as physicians and biochemists, to ensure that drugs are safe and effective. Their research plays a crucial role in the development of new medications and the advancement of healthcare.