(Antianxiety)
The main uses for Ativan are anxiety, irritability
in psychiatric or organic
disorders, preoperatively, insomnia, and as an adjunct in endoscopic procedures. It's "unlabeled" uses are antiemetic prior to chemotherapy, status epilepticus, rectal use, alcohol withdrawal and seizure prophylaxis.
Nowhere in any medical reference does it state Ativan is used for the treatment of depression.