<unk>  is a radiographic contrast agent that is FDA approved for the procedure of cerebral arteriography and peripheral arteriography (300 mg i/ml), coronary arteriography and left ventriculography, visceral angiography and aortography (370 mg i/ml), peripheral venography (240 mg i/ml), contrast computed tomography (CT) imaging of head and body (300 mg i/ml and 370 mg i/ml), and excretory urography (300 mg i/ml). There is a Black Box Warning for this drug as shown here.  Common adverse reactions include headache, dysguesia, abnormal vision, chest pain, vasodilatation, nausea, vomiting, back pain, urinary urgency, injection site and infusion site reactions, and pain.
Iopromide
Iotrolan
Methylergonovine 
Avacopan
Penbutolol
Diisopromine
Methysergide
Cabergoline