u2, let me try a different approach.
1. Both Dilantin and SSRIs work in the brain and cross the blood brain barrier.
2. Dilantin has more negative side effectives than Prozac or Luvox.
3. So why are you willing to take Dilantin, and you are scared to death of the SSRIs?
Your OCD is controlling you to the point whereby you are going stop something that has helped? Nonsense u2!!! I know people who have been on anti-depressants, even the more toxic tri-cyclics for 25 years, and they are fine.
If you were taking older anti-psychotic medications, used to treat Schizophrenia, then I would understand your concern about the longterm effects.... those drugs often cause tardive dyskenesia over the course of many years, and that is irreversible, and a very bad permanent side effect.
But SSRIs DO NOT CAUSE THIS! I have read that some docs feel that occasion "drug holidays", whereby a person taking a psychotropic medication for longterm use (especially the older anti-psychotics) is periodically taken off the medication for a short period of a couple weeks, and then put back on it can help stop TD from developining.
So, to allay your fears, I suggest this. Stick with the Zoloft, or switch to Prozac/Luvox... take for 6 months, then take a 3 week drug holiday, then restart the cycle again. Your only other choice would be to stop it all together, and then let OCD take complete control of your life!
I hope this helps. Would appreciate an "accept" for this. I really want to help you, and will be glad to answer one follow up question later today.