Can Duromine And Mirtazapine Be Taken Together?

Hi I'm a 26 year old female and was diagnosed with depression a couple of years ago. Since going on the antidepressants I gained a lot of weight, so started taking duromine nearly a month ago and stopped taking my antidepressants. Since being on duromine I have noticed I feel very nervous, anxious and scared all the time for no apparent reason and very sick in the stomach. I was thinking of starting to take up one of my old antidepressants mirtazapine with the duromine to stop the anxiety, can I do this ? And if so will the mirtazapine stop the duromine from working because I believe one of the symptoms of mirtazapine is weight gain and increased appetite. Thanks