Another potential contender can be bipolar
bipolar [adjective]
- (of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only.
(of psychiatric illness) characterized by both manic and depressive episodes, or manic ones only.
- (of a person) suffering from bipolar disorder.
(of a person) suffering from bipolar disorder.
source: ODO
From Royal College of Psychiatrists:
Bipolar I
If you have had at least one high or manic episode, which has lasted for longer than one week. You may only have manic episodes, although most people with Bipolar I also have periods of depression. Untreated, a manic episode will generally last 3 to 6 months. Depressive episodes last rather longer - 6 to 12 months without treatment.
