Patients with the deterioration of cognitive processing known as dementia, which commonly takes the form of Alzheimer's disease, have far higher medical costs than those with other illnesses -- more than $60,000 in out-of-pocket expenses compared with about $34,000, according to a 2015 study of Medicare beneficiaries. The analysis, which appeared in the journal Annals of Internal Medicine, points to another cost: an estimated $83,022 (not to mention the emotional toll) for each caregiving family. Although the disease is incurable, progress can be slowed with drug therapy. Watch for lapses in memory, frequent trips and falls, and detached staring, as well as some more subtle or surprising behaviors: impulsive shoplifting or other petty criminal behavior, ritualistic hoarding, slow walking, trouble chewing crunchy foods and fluctuations in taste buds (such as suddenly craving a previously disliked food or even eating inedible things), failure to understand sarcasm or irony, and drastic personality shifts.