The use of conducted energy devices – better known under the brand name Taser – by police officers is subject to scrutiny. Consequently, the clinical assessment and management of people who have been exposed to Taser discharge is also subject to scrutiny. In 2021 the Conducted Energy Device Joint Working Group published a new guideline on assessment in police custody after Taser discharge. The guideline enables any appropriately trained and competent healthcare professional, including nurses, to undertake post-Taser assessments and determine the person’s fitness to be detained in police custody. This would be done in the first instance by nurses working in police custody suites, but emergency department (ED) nurses may also be involved, as people who have been ‘tasered’ may need referral to the ED. This article explains how Tasers work, their physiological effects and potential complications, and the required approaches to clinical assessment and management as outlined in the new guideline.