What is inhibitor and how does it work?

An inhibitor is a substance that slows down or prevents a chemical reaction or the activity of an enzyme. It works by binding to the enzyme or another molecule involved in the reaction, thereby altering its structure or blocking its active site, which reduces its ability to facilitate the reaction. Inhibitors can be reversible, where they temporarily bind to the target, or irreversible, where they permanently inactivate the target. This mechanism is crucial in various biological processes and is commonly utilized in pharmaceuticals to regulate metabolic pathways.