Well I would say that over time, your body should become more and more use to the medication (in terms of side effects), but over time your not going to become more and more use to your symptoms so it's best to stay on medications.

For the paranoia, there are lots of medications out there to try besides geodon. I don't know where you live but here in the US there's:
Abilify, Zyprexa, Seroquel (or Seroquel XR), Risperdal, Invega, Fanapt, Saphris, and should all these fail there's the option of using Clozaril.

All these medications will take you to the drug's website should you type them in google.

I wish you luck and I hope you find the med combination that works for you.
Andy...