It is true that the medically useful/effectful dose is not that much lower than the truly damaging one, so this is one drugs where you absolutely should never surpass the determined safe doze (or course don’t do that with any other one either, but for example frontin/xanax is deliberately made in a way that even taking a whole box of it will just send you to a really deep sleep), but I don’t think that using it from time to time would be any worse than drinking a bit of wine during your date at a restaurant.