The main symptoms of<unk>  are nightmares, agitation, global confusion, disorientation, visual and auditory hallucinations, tactile hallucinations, fever, high blood pressure, heavy sweating, and other signs of autonomic hyperactivity (fast heart rate and high blood pressure). These symptoms may appear suddenly but typically develop two to three days after the stopping of heavy drinking, being worst on the fourth or fifth day. Also, these symptoms are characteristically worse at night. In general,<unk>  is considered the most severe manifestation of alcohol withdrawal and occurs 3–10 days following the last drink. Other common symptoms include intense perceptual disturbance such as visions of insects, snakes, or rats. These may be hallucinations or illusions related to the environment, e.g., patterns on the wallpaper or in the peripheral vision that the patient falsely perceives as a resemblance to the morphology of an insect, and are also associated with tactile hallucinations such as sensations of something crawling on the subject—a phenomenon known as formication.<unk>  usually includes extremely intense feelings of "impending doom". Severe anxiety and feelings of imminent death are common<unk>  symptoms.<unk>  can sometimes be associated with severe, uncontrollable tremors of the extremities and secondary symptoms such as anxiety, panic attacks, and paranoia. Confusion is often noticeable to onlookers as those with<unk>  will have trouble forming simple sentences or making basic logical calculations.<unk>  should be distinguished from alcoholic hallucinosis, the latter of which occurs in approximately 20% of hospitalized alcoholics and does not carry a risk of significant mortality. In contrast,<unk>  occurs in 5–10% of alcoholics and carries up to 15% mortality with treatment and up to 35% mortality without treatment.
Delirium tremens
Barbiturate
Ateliosis
Benzodiazepine withdrawal syndrome
Excited delirium
Hepatic encephalopathy
Bell's mania
Emergence delirium