<unk> (injection) is a naturally occurring photoactive substance that is FDA approved for the treatment of the skin manifestations of Cutaneous T-Cell Lymphoma (CTCL) that is unresponsive to other forms of treatment. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include erythema, pain of skin, pruritus, nausea, dizziness, headache, fatigue.
Methoxsalen 
Trioxsalen
Isothipendyl
Naloxegol
Mannosulfan
Perflubron
Cloethocarb
Dicyclomine