Eszopiclone
[Lunesta]Among the z-hypnotics, has the most benzo-like properties, and can augment antidepressants (short term) in depression and GAD.
Medication
Diphenhydramine
Although over the counter, the prescription version (hydroxyzine) is safer with fewer anticholinergic risks.
Buspirone
Treats anxiety (GAD). Augments in depression but only if anxious. Also improves sexual dysf, bruxism, irritability, PMDD
Dextromethorphan
Think of it as low-potency ketamine. Rapid acting as Auvelity in depression, or as monotherapy (3rd line) in bipolar depression. Abuse potential.
Lithium
Best long-term outcomes in bipolar (I or II) and recurrent depression. Prevents suicide. Treats mania, bp-depression and augments antidepressants.
Celecoxib
[Celebrex] NSAID for treatment-resistant unipolar and bipolar depression [3], works better if inflammation [2]. Well-tolerated short term, but long-term risks.