Hi, I Have Been Taking Duromine 30mg For The Past

Hi, I have been taking Duromine 30mg for the past 4 weeks and have not been able to loose any weight? So you think this is because I am also taking Lovan 20mg? As I hear that they can interact with each other, would this be the reason that I have not been able to loose any weight the past 4 weeks? I have now started on Duromine 40mg and am weaning myself off the Lovan.