I had a CTSCAN of my stomach and pelvic area about 4 weeks ago - the day after the scan I went into what felt like hyperthyrodism (spelling) , BP up, vomiting, sweating, day or 2 later i noticed my tongue swollen, then my face is swollen and other areas i just discovered not to easy to see *wink are swollen. I tried antihistamines but they are not working. Should I see about a GP about predisone. I drank the oral solution gastrografin - which i have found similar side effects as I am mentioning as well as a delayed reaction to the solution.