Mechanism based inhibitors, also known as suicide inhibitors, are a special class of enzyme inhibitors that irreversibly inactivate enzymes through a catalytic mechanism. These inhibitors resemble the natural substrate of the enzyme and bind to the active site, where the enzyme’s own catalytic activity converts the inhibitor into a highly reactive intermediate. This reactive species then forms a covalent bond with the enzyme, leading to permanent inactivation. Unlike reversible inhibitors, mechanism based inhibitors rely on the normal enzymatic process to generate the inhibitory effect, making them highly specific and efficient. The mechanism of action begins with the binding of the inhibitor to the active site, mimicking the substrate’s structure. The enzyme recognizes the inhibitor as a legitimate substrate and initiates the catalytic process. During catalysis, the inhibitor undergoes chemical transformation, producing a reactive intermediate that attacks functional groups within the enzyme’s active site, such as serine, cysteine, or lysine residues. This results in the formation of a stable covalent complex between the enzyme and inhibitor, thereby preventing further catalytic activity. Because the enzyme participates in its own inactivation, the process is often