ADD, Anger and Memory Lost

I am the Non Add Spouse and I'm looking for some answers regarding memory lost when the ADD person is very angry. My partner gets extremely angry very quickly and is rude, condescending and mean some times. He knows (a few days later) that he crossed the line, but he cannot remember what happened. Is this a normal/predictable ADD effect? I have not found any info on this topic and wondering if any of you have experienced something similar. So think of your spouse being so rude to you, so angry, so mean... but he cannot remember what he did or said to you. This is pretty scary to me.