Since you're already taking the "maximum" daily dosage of Remeron (a nice antidepressant, with very few if any important side-effects), I suppose you could ask your doctor to try a different antidepressant. Remeron might not be the one for you.
Maybe a different antidepressant would be more effective. The new one might have some side-effects, however. Be sure to ask. Or, use the Rx List website if you want to do your own medication research.
http://www.rxlist.com/
(Use the medication brand name in the search box. Then click on the GENERIC name when you are shown the box containing both the brand and the generic names. Clicking on the GENERIC name will lead you to full information about the drug.)
Adieu