I was taking Mylan brand lorazepam, 2mg tablets daily for sleep. Now, they have switched to the Watson brand, which is not as effective ... (i.e. their rate and extent of absorption) when compared to their brand name. Find out why Ativan (Lorazepam) is prescribed, side effects of Ativan, Ativan warnings, effects of Ativan during pregnancy, more - in plain English. Generic name: Lorazepam Brand name: Ativan.