Can taking Duromine increase the possibility of sinus infection, in being that amphetamines apparently dilate nasal passages, then possibly lead to increased chance of infection? I tried Duromin in September 2013 and lost 20kg in 6 weeks with strict diet and 2-3 hours walking a day. However, at the end I got a serious sinus infection. Also, my sinus were really sensitive to cold air conditioning while I was taking it and though I have had a history of frequent ENT infections and hay fever in cropping regions, had never had an actual sinus infection before.