Can anyone assist please?

I have been on 150 mgs of Dothiepin (also known as Prothiaden, Thaden, Dosulepin, Dothep and Dopress) for the past 10 months. While it has been effective for my depression, anxiety and insomnia, I developed severe restless leg syndrome, a reaction to the medication, which has become debilitating.

I researched restless leg syndrome and discovered that there is a safe antidepressant that doesn't cause RLS namely welbutrin. Went to my doctor who said this is also marketed as Zyban (an anti-smoking drug) and he prescribed it for me, telling me to reduce the Dothiepin over a week to 100 mgs (to take at night still) and the Zyban in the morning.

I am really concerned about interactions between the two drugs. Does anyone have any knowledge concerning this please? I am due to start the Zyban tomorrow morning.