Hmmm, trying to potentiate lorazepam? Benzo's are something I rarely take solo, (ecspecially lorazepam, and the exception being of course alprazolam). I would say weed is a great potentiator, as benzo's work wonders on the negative effects of cannabis. Other than that a brew or two will get you feeling nice, but there's a thin line in my experience between a nice relaxed buzz and blackouts and shit getting broken, so naturally, pace yourself