Hypomania (literally, "below mania") is a mood state characterized by persistent and pervasive elevated (euphoric) or irritable mood, as well as thoughts and behaviors that are consistent with such a mood state. It is most often associated with the bipolar spectrum. Many who are in a hypomanic state are extremely energetic, talkative, confident, and assertive. They may have a flight of ideas and feel creative. Many people also experience signature hypersexuality. While hypomania often generates productivity and creativity, it can become troublesome if the subject engages in risky behaviors.
Individuals in a hypomanic state have a decreased need for sleep, are extremely outgoing and competitive, and have a great deal of energy. However, unlike with full mania, those with hypomanic symptoms are often fully functioning.
While most often associated with bipolar disorder, hypomania is also a side effect of numerous medications, often those used in psychopharmacotherapy. In cases of true drug-induced hypomania, discontinuation of the antidepressant or drug that has triggered the episode—for example steroid therapy or stimulants such as amphetamine—usually causes a fairly swift return to normal mood. It is less likely to be a side effect in those with pure clinical depression or unipolar depression, unless for example tricyclic antidepressants are given in very high doses. SSRIs are less likely to trigger manic symptoms.