lorazepam is a benzodiazapene commonly used to treat anxiety. It is also used as a muscle relaxant, sleep aid, antiemetic, antiseizure med, and for Ethanol detoxification.
Some of the signs and symptoms associated with excess use include:

Anterograde amnesia: Benzodiazepines have been associated with anterograde amnesia.
CNS depression: May cause CNS depression, which may impair physical or mental [...]