I was in a rush, so only retained about 15 minutes. I was worried that it wasn't enough time to absorb all the iodine, but 40-45 minutes after I first took the enema, I got the tingling in my legs and face again. This time, though, I had an occasional pulsing/fluttering in the left thigh, both calves and right jaw. Eyes are still improved and have not reverted to the previously bad eyesight. Getting headaches from when I'm forced to wear my glasses.