In the article “Pharmacology, Part 1: Introduction to Pharmacology and Pharmacodynamics,” by Currie (J Nucl Med Technol. 2018;46:81–86), the dissociation constant is incorrectly defined as the ratio of the rate of association to the rate of dissociation, whereas it is instead the ratio of the rate of dissociation to the rate of association. We regret the error.
