Azilect is a monoamine oxidase-B (MAO-B) inhibitor. It works by increasing the levels of certain chemicals in the brain. Azilect is used to treat the symptoms of Parkinson's disease (stiffness, tremors, spasms, poor muscle control). Azilect is sometimes used with another drug called levodopa.

Vilazodone is an antidepressant in a group of drugs called selective serotonin reuptake inhibitors (SSRIs). Vilazodone is used to treat major depressive disorder (MDD). Do not use Vilazodone if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, or tranylcypromine, or if you have had a methylene blue injection.