most medications are good for about a year after you get them from the pharmacy that is if they are stored properly away from direct heat or light and in a cool dry place. i do not recommend keeping medication longer than a year because passing time increases the likelihood that mistakes can be made while taking it. if you haven’t used the lorazapam in years most likely you don't need it. so i would recommend discarding it. the best way to dispose of medication is through a local drug take-back program. or mix the pills with an undesirable substance -- like kitty litter or used coffee grounds -- wrap it all up and throw it away. flushing medications down the toilet is not recommended.
i have some lorazepam from a few years back. how long can medicine be stored?