*'''Adrenaline''', 0.3-0.5mg in adults, given intramuscularly, is the most important initial therapy.<ref name=SURF>{{cite web|url=http://www.mastcellssjukdom.se/wp-content/uploads/2015/12/Nationella_rekommendationer_%C3%B6verk%C3%A4nslighetsreaktioner_kontrastmedel__PDF_2014-10-17.pdf|title=Hypersensitivity reactions against contrast media - Swedish Society of Uroradiology [Swedish: Överkänslighetsreaktioner mot kontrastmedel – SURFs kontrastmedelsgrupp] ], 2014-10-17}}</ref>