Complex sentence: Others have severe depression with delusions, verbal hallucinations, mutism, stupor or transient swings into hypomania; some switch from mania to depression (or vice versa) within the same episode.
Split into simpler sentences: Others have severe depression with delusions, verbal hallucinations, mutism, stupor or transient swings into hypomania. Some switch from mania to depression (or vice versa) within the same episode.