I have been taking champix for over a month now and have come up with a rash on my cheeks.It can be itchy and sore sometime and looks like little pimples .I rarely,if ever,get pimples on my cheeks.The skin on my cheeks, forehead ,hands and forearms has been very dry and no matter how much i moisturise,it doesn t seem to help.Would this be just a side effect or maybe an allergic reaction?