Individuals in a hypomanic state have a decreased need for sleep, are extremely outgoing and competitive

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. 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 systems are fully functioning, and are often actually more productive than usual. Specifically, hypomania is distinguished from mania by the absence of psychotic symptoms and by its lower degree of impact on functioning. Hypomania is a feature of bipolar II disorder and cyclothymia, but can also occur in schizoaffective disorder. Hypomania is sometimes credited with increasing creativity and productive energy. A significant number of people with creative talents have reportedly experienced hypomania or other symptoms of bipolar disorder and attribute their success to it. Classic symptoms of hypomania include mild euphoria, a flood of ideas, endless energy, and a desire and drive for success. A lesser form of hypomania is called hyperthymia.

Hypomania is also a side effect of numerous medications, often—though not always—those used in psychopharmacotherapy. Patients suffering from severe depression who experience hypomania as a side effect of (for example) antidepressants, may prove to have a form of bipolar disorder that has previously gone unrecognized. However, drug-induced hypomania is not invariably indicative of bipolar affective disorders. The difference between uni- and bi-polar disorders is essential for analysis of switches. Consequently, it is important for researchers and mental health professionals to distinguish drug-induced hypomania in bipolar patients from drug-induced hypomania in unipolar (non-bipolar) depressives. Nevertheless if antidepressants trigger the first episode of hypomania, it is strongly suggestive of an underlying diagnosis of Bipolar Disorder, particularly if the manic symptoms (mild, moderate or severe) last for a lengthy period of time after they start. In cases of true drug-induced hypomania, cessation of the antidepressant or whichever drug has triggered this mood state - for example steroid therapy or stimulants such as amphetamine - usually causes a fairly swift return to normal mood. It is far less likely to be a side effect in those with pure Clinical Unipolar Depression, unless for example tricyclic antidepressants are given in very high doses. SSRIs are less likely to trigger manic symptoms except in those individuals where there is an underlying Bipolar Disorder, particularly if administered without a mood stabilizer.

Often in those who have experienced their first episode of hypomania (which is a level of mild to moderate mania) - generally without psychotic features - there will have been a long or recent history of depression prior to the emergence of manic symptoms, and commonly this surfaces in the mid to late teens. Due to this being an emotionally charged time, it is not unusual for mood swings to be passed off as hormonal or teenage ups and downs and for a diagnosis of Bipolar Disorder to be missed until there is evidence of an obvious manic/hypomanic phase.[1]

Hypomania may also occur as a side effect of pharmaceuticals prescribed for conditions/diseases other than psychological states or mood disorders. In those instances, as in cases of drug-induced hypomanic episodes in unipolar depressives, the hypomania can almost invariably be eliminated by lowering medication dosage, withdrawing the drug entirely, or changing to a different medication if discontinuation of treatment is not possible.[2]