Inhibitors, also known as blockers, are substances that prevent or reduce the activity of specific biological processes. They can target enzymes, receptors, or other molecules in the body, effectively slowing down or stopping certain reactions. This can be useful in treating various medical conditions, such as cancer, hypertension, or inflammatory diseases. Inhibitors work by binding to their target, which can either block the active site of an enzyme or interfere with the interaction between molecules. This mechanism helps regulate processes like cell growth or neurotransmission, making inhibitors valuable tools in pharmacology and drug development.