Compulsive hoarding
Obsessive-compulsive disorders are treated with various serotonergic antidepressants including the tricyclic antidepressant clomipramine and various SSRI medications. With existing drug therapy, OCD symptoms can be controlled, but not cured. Several of these compounds (including paroxetine, which has an FDA indication) have been tested successfully in conjunction with OCD hoarding.
Anxiolytic
Selective serotonin reuptake inhibitors or serotonin-specific reuptake inhibitors (SSRIs) are a class of compounds typically used in the treatment of depression, anxiety disorders, OCD and some personality disorders. Primarily classified as antidepressants, most SSRIs have anxiolytic effects, although at higher dosages than used to treat depression. Paradoxically, SSRIs can increase anxiety initially due to negative feedback through the serotonergic autoreceptors. For this reason a concurrent benzodiazepine is sometimes used temporarily until the anxiolytic effect of the SSRI occurs.