Prozac is an SSRI antidepressant. With your moods changing so rapidly (highs and then lows), you may respond to a mood stabilizer like Depakote, Neurontin, Lithium,etc. Don't give up hope. Your problem is not uncommen. Many times when patients begin an antidepressant, it will unmask the Bipolar condition. Most patients I care for, as a psychiatric nurse, are on an combination of an antidepressant with mood stabilizer to control those hypomanic/dysphoric states. Good luck and don't give up. Work closely with your doctor to find the right combination and dosage for you.