Diplopia (double vision) and a “rolling” sensation (vertigo) due to alcohol are primarily caused by alcohol entering the fluid of the inner ear, which disrupts the balance-sensing organs and impairs brain function. This condition is often referred to as “the spins” or positional alcohol nystagmus, which occurs because alcohol changes the density of the fluid in the vestibular canals. The Mechanism of Alcohol-Induced Vertigo and Diplopia Inner Ear Fluid Disruption: Alcohol is absorbed into the fl