Can't stop sweating after my ct angiography is this normal?

May be allergic reac: It may be allergic reaction to the IV contrast they use which contains iodine, it may be a mild reaction and should be self limiting but if you continue to sweat and/or any other symptoms appear, see your doctor.

Sweating: Are you still sweating now? Do you have hives? Is your pulse normal you may be having a mild reaction to the contrast. You can retake some Benadryl (diphenhydramine) and keep drinking lots of fluids. If it continues go to your doctor.