Bipolar disorders in people over 65

The incidence of bipolar disorder in people over 65 is similar to that in younger people. It accounts for between 5 and 10 percent of affective illness in old age.

The symptoms are similar to those found a younger age group, but in older people it is more likely that a depressive episode will occur immediately after a manic episode.

Treatment is similar to that for a younger age group, with some minor differences. For example, because older people are more sensitive to medication, lithium blood levels should be monitored with particular care and the level should be kept at the lower end of the therapeutic range.