To a patient who is taking Ziprasidone (Geodon) and want to taper it down, we usually ask him or her to taper it down over a 6-8 week period.
For example, assuming that a patient is taking 160 mg per day, we may tell him or her to reduce the dose by 20 mg per week till he or she is able to stop it completely.
Please note that, tapering process varies from individual to individual patient and the rate of tapering can vary. It can be slower or slight faster depending on the tolerance power of patients.
You can discuss with your psychiatrist about this strategy and hopefully you will be able to stop it very soon.
Please feel free to discuss further if you have any other query / doubt in your mind.