American snuff is largely packaged in moist forms, in dissolvable strips or lozenges or tea bag kind of pouches. The consumer places a pouch or pinch of snuff behind the lips or between the gums and cheek. Moist snuff is also known by the name snus. Some consumers use dry snuff by inhaling it through the nose.
Delirium (sometimes called acute confusional state) and dementia are the most common causes of cognitive impairment, although affective disorders (eg, depression) can also disrupt cognition. Delirium and dementia are separate disorders but are sometimes difficult to distinguish. Delirium affects mainly attention. Dementia affects mainly memory. Delirium is typically caused by acute illness or drug toxicity (sometimes life threatening) and is often reversible. Dementia is typically caused by anatomic changes in the brain, has slower onset, and is generally irreversible.
There are some important differences between depression in people with dementia and depression in people without dementia. Depression with dementia is likely to involve change in mood, delusions, agitation, and anxiety while other symptoms usually associated with depression, such as guilt, suicidal thoughts, and low self esteem are not as common.