Brain zaps are sensory disturbances that feel like electrical shock sensations in the brain. They can also be accompanied by a brief buzzing sound and a feeling of faintness or momentary blackout. Brain zaps can occur when a person decreases or stops using certain medications, particularly antidepressants. They are not harmful and will not damage the brain, but they can be bothersome, disorienting, and disruptive to sleep. There is no definitive way to prevent brain zaps, but people have tried some supplements with mixed degrees of success, such as omega-3 fatty acids, magnesium, and vitamin B12. However, its important to ask a doctor before taking any vitamins or other supplements, as they may interfere with other medications.