psychosis
"I have been on Navane for almost 30 years.  I have had two psychotic episodes and they have occurred only when I went off this medicine.  I have tried other medications but I feel most secure on Navane.  The side-effects are: some drowsiness and feelings of depression.  Otherwise, I feel more natural on Navane than on any other anti-psychotic medication I have tried and that's why I will continue to use it."