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.
Cause of obsessive-compulsive disorder
Dopaminergic systems are implicated in OCD by the efficacy of dopaminergic agents, the fact that PANDAS may be implicated, and by various neuroimaging studies. OCD may be treated with antipsychotic agents, however psychostimulants agents have also shown some promise in alleviating the symptoms of OCD. Although these need to be reconciled, they both implicate the dopaminergic systems. OCD also has a high comorbidity with ADHD, which is treated with psychostimulants and may result from increased phasic and decreased tonic signaling of dopaminergic neurons. PANDAS also affects the basal ganglia, where dopamine plays a large role as a neurotransmitter.