causes of blacking out
Fainting, blacking out, or syncope is the temporary loss of consciousness followed by the return to full wakefulness. This loss of consciousness may be accompanied by loss of muscle tone that can result in falling or slumping over.
Blackouts can also be caused by a variety of drugs and other substances including: Alcohol intoxication. Medication side effects, such as the side effects of cancer treatments or seizure medications, or agents used for anesthesia. Poisons, such as cleaning chemicals or pesticides.
Blackouts may arise from a variety of conditions or events that affect the brain. Often, blackouts will result from a traumatic event or an event that involves head injury. Blackouts may often be caused by trauma to the head or brain including: Complications of brain surgery.