What Causes Fatigue And Excessive Sleep After Taking Mylan?

I have a concern about which mfg. of lorazepam 1mg. I have had bad experiences with Watson, sandox, Ranbaxy and now I am taking Mylan 457. I am tired of no energy during the day and sleeping a lot during the day with lot of anxiety. Does Mylan 457 belong to the same mfg as Watson, Sandox and Ranbaxy. Thanks for your help which is needed...