Hi Pam,Brett is absolutely correct (thanks Brett). Blurry vision and breathing problems are indeed side effects of Levsin and other antispasmodics - and it could also be allergies, or any other number of things.While we all like to have a cause for everything that happens to us, (I know I do!) I believe that the sessions in themselves do not cause blurry vision, breathing difficulties or panic attacks. These could have been caused by any number of things as I said, and while you may want to put a cause on it, sometimes it is best to contact your doctor and/or ask about side effects from any medications he may be taking. It is possible that he may have built up fears over the years - especially if he has been dealing with IBS as at relates to his self-image, etc. The program does deal with self-esteem and lays a foundation of well-being in the very first session. His age is of course, notorious for self-esteem issues - wanting to be one of the crowd, etc. so there could have been a few things tapped there - but that is actually a good thing, because it means progress is beginning. These things have to be recognized before they can be addressed. Kids usually get into it more quickly than adults because they have less baggage - tho not always true. But I sort of doubt that it was the session.My daughter is 18 and has had panic attacks, functional abdominal pain, etc. and some of these things come out of the blue and there is no real "cause" per se or explanation. We have been to lots of doctors and after ruling out medical etiology, she is in therapy and is on meds for this and doing much better. (She doesn't have IBS, but uses another program of Mike's which helps her very much.)If you mention that the session is the "cause" of these things to your son, this may become a belief for him and may hinder his progress. There is no way to know for certain - but I wouldn't want him to fear the sessions and not do them if he makes that a connection, which may and most likely is not even be a valid one.Please feel free to call the toll free number and this can be discussed a bit if you wish. I am more than happy to help - as I have been there myself, and have two kids who have had issues as well.Hope this helps...