Coagulopathy is common in critically ill patients and may result in complications such as bleeding or thromboembolic events. Viscoelastic testing (VET), including both thromboelastography (TEG®) and rotational thromboelastometry (ROTEM®), offers a benefit over conventional coagulation tests in that it provides a qualitative and quantitative assessment of the degree of coagulopathy, including the ability to measure fibrinolysis. This review is a “how‐to” primer for critical care pharmacists to interpret and utilize VET in practice across a spectrum of coagulopathies, including trauma and traumatic brain injury, neurologic injury and emergencies, cardiothoracic surgery, liver disease, and medication‐induced coagulopathy.