<unk> (transdermal) is a monoamine oxidase inhibitor (MAOI) that is FDA approved for the treatment of major depressive disorder (MDD). There is a Black Box Warning for this drug as shown here.  Common adverse reactions include application site reaction, headache, insomnia, diarrhea, dry mouth, dyspepsia, rash, pharyngitis and sinusitis.
Selegiline 
Rasagiline
Perhexiline
Fendiline
Bedaquiline fumarate
Valpromide
Deutetrabenazine
Levodopa