I had the breathing problems also. Many doctors use pulse dosing. 2 days on 2 days off, 4 days on 4 days off. I cut back my dosage and waited till symptoms went away and started again. I believe the Iodine tried to clean out too much too fast. But the pulsing has really helped. I believe my breathing problems were caused by anxiety. I take one iodoral tablet a day and the following day 2 to 4 drops lugols. I take the days off after 2 to 4 days on. I'm just experimenting as we all are and hope to achieve good results this way. So far though it's working for me. It's a work in progress. Just listen to your body. You may want to build up first after going through a long cleanse and then when stronger try again. I'ts all up what your body is telling you now.