Hello Doctor, My husband had bipolar disorder and was prescribed 15mg of Oleanz. This was later tapered to 10 mg and along with it he has Lithium 900mg in a day (1 in the morning and 2 in the night of 300mg each). After 5 months, oleanz was reduced to 7.5mg. For 2 months,he reduced the dosage to 5mg and then to 2.5mg. Then doctor advised him to stop using oleanz and continue only with Lithium. For a total of 9 months, he has had Oleanz. Now, when he stopped Oleanz,he is having dizziness in the evening everyday and sleep has reduced very much. What could be the reason for this?