The phrase "manic phase" refers to a period of intense excitement, high energy, and impulsive behavior experienced by a person with bipolar disorder. Full definition
However, sufferers of bipolar disorder will almost certainly experience excessive irritability or aggressive behavior during manic phases. (health.com)
Esnayra managed her bipolar disorder for years, until the events of September 11, 2001 sent her into a severe manic phase, though it wasn't until months later that she realized what had happened. (sciencemag.org)
Medication with lithium and valproate prevents manic phases and has mood - stabilizing effects. (news.cision.com)