A reversible inhibitor is a type of molecule that temporarily binds to an enzyme or receptor, reducing its activity without permanently altering its structure. This interaction allows the enzyme or receptor to return to its original state once the inhibitor is removed, making it a flexible option for regulating biological processes. These inhibitors are often used in drug design to modulate the activity of specific proteins, such as enzymes involved in disease pathways. By controlling the binding and release of reversible inhibitors, researchers can develop therapies that minimize side effects and enhance treatment efficacy.