smilinize, you might have keyed me into one of my DH's problems. He suffers with sinus, headaches and hearing problems. Won't hurt for him to try N.A.C., I'm sure. He did try Sinus Support EF and it helped his sinuses while he was taking it. His EARS working would be an added BONUS!!! My problem is getting him to take something regularly. He'll stick with it until things get better, then he'll slack off.