This document summarizes dizziness and syncope. Dizziness is a common complaint that can have many causes including vertigo, disequilibrium, and presyncope. A careful history and exam can often determine the etiology as central, peripheral, or psychiatric. Syncope is the transient loss of consciousness and posture due to decreased brain perfusion. The evaluation of syncope focuses on identifying potentially life-threatening cardiac causes through history, exam, EKG and selected testing. Neurocardiogenic or vasovagal syncope is often diagnosed clinically without extensive testing. Admission is recommended for high risk patients but many can be safely discharged with careful evaluation.