Frequency of Single or Combined Anticholinergic Medication Usage as Potentially Inappropriate Medications among the Oldest-Old Age Subgroup.

The oldest-old age group used medications with anticholinergic effects. A strong anticholinergic effect was obtained when medications with low or moderate anticholinergic effects were combined. Medications with anticholinergic effects should also be reviewed in the safety analysis of medications used by the oldest-old.