Well, the probability over all age groups is roughly the same as getting colorectal cancer, if that’s any consolation. But the problem has been noted after just a handful of doses, and when it happens it’s disabling.
If you have a true allergy to penicillan-class antibiotics you can’t take amoxicillan, etc., or the cephalosporins, but can take the floxins as you know, tetracycline, and azithromycin, among others.
I wouldn't say I was allergic to anything unless it was true. My entire body broke out in a rash due to penicillin and I was told never to take it again as it would be much worse the next time - parts of my skin would come off. My medical record says never to give me that and never to give me iodine.
I'm severely allergic to iodine. I have a permanent scar with no coloring in it (it ate the pigment in the skin) as in a hospital, I was given an iodine test under the skin and that skin came off and the iodine kept eating through layers of muscle and it had to heal from the bottom up. I wore a band aide over that place until it healed because it looked like I was a junky shooting up at that place. My medical record also says never to give me iodine.
I had cataract surgery a couple of years ago, and iodine is used to prepare the eye area for that surgery. The surgeon used something other than iodine to sterilize that area. I can't imagine what would have happened if iodine was used in my eye area.