Can i take unisom instead of lorazepam at night when i can't sleep due to anxiety?

Yes: It is better to avoid short acting benzos if you suffer from an anxiety disorder, other benign, effective and very commonly used medications for sleep include trazodone, doxepin, Amitriptyline and at times vistaril (hydroxyzine).

Yes: Yes but would not rec taking both together. Try some melatonin as well. It may improve you quality of sleep.

Unisom: On as needed basis, but do inform your doctor about any meds. U are adding or substituting.