Welcome to the site.
I am a psychiatrist and i believe i can help you with your query.
Well, first of all if you are doing fine without lamictal then you and your prescribing doctor should together take a decision on whether it needs to be reintroduced or not to use it since you are keeping fine without its use also by being only on zoloft alone.
However, if the decision is taken of restarting on it then i would suggest that you first start on 50 mg dose / day and then after 1 week go up to 100 mg / day and then after 1 week further up to 200 mg / day and stay maintained on this dose.
I somehow feel that it has been a long duration that you have taken this drug and now the need of it may not arise, so in that case take 2 more weeks to decide with your doctor to start it again or not.
I hope this helps.
Wish you all the best.
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