Bipolar I

Bipolar disorder I is characterized by at least one manic episode. It is estimated that in 60%-70% of cases, the manic episodes of bipolar I either precede or follow a depressive episode.  There are however some people who may never experience an episode of major depression.

It is common in this type of bipolar for a person to experience mixed episodes, where both the symptoms of mania and depression are present at the same time.

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