All I know is that after an evening dining at a restaurant in San Jacinto Monument in TX that served “All you can eat” giant Gulf shrimp as an appetizer, I woke up thinking I had gone blind. When I finally pried my eyes open far enough to be able to look in the mirror, I could see that my face was swollen up like a balloon. I had to have a shot to make the swelling go down.
I’ve had similar reactions (although not as severe) even if the agent was a stir fry where the shrimp had been picked out in the kitchen before it was served to me. (a fancy resturant in Milwaukee). When nurses rub my skin with betadine, I break out in hives. Same with contrast IVs for CT scans to the point that the hospital has told me never to have one again. I have nuclear scans when they are looking for a blood clot with good results.
I’m staying far away from iodine and iodine containing products. The next reaction could affect my throat, or my breathing. No thanks.