[G Larry]

My wife is an Audiologist and is a tinnitus expert and recommends NAC for her patients. 600 mg/day.

The bottle says 1 -3 times per day, but I have no idea on dosages for the study your son was in.

[RummyChick]

Your post is why I love the internet.

I got ear ringing after a vaccine and no one knows what to do with it other than shrug their shoulders.

poster PA Engineer is some kind of medical person. He is a big believer in NAC

I am going to give it a try to see if it will help