A mood episode is a set of symptoms that occur at the same time. For instance, a major depressive episode is a depressive mood that is characterized by indifference to ordinary pleasures of life and lasts for a minimum of two weeks. Other characteristics of a mood episode include changes in energy levels, change in sleep patterns, loss of weight, loss of focus. In extreme cases, the patient may manifest persistent feelings of guilt or worthlessness or recurrent thoughts of suicide.
On the other hand, a manic episode is a period when the patient has a persistently elevated or euphoric mood. The symptoms include increased talkativeness, hyperactivity, distractibility, and grandiosity. Most maniac episodes progress rapidly and lead to impaired social or occupational functioning. In extreme cases, the patient may manifest delusions and psychotic hallucinations.