The new meds or their timing may be the problem. He might talk with the doctor if this continues to be a problem. Some drugs just agree with some people better than others or adjusting the dose or timing may be appropriate. Good communication with a good doc is the best treatment. Of course xanax is a good choice to help him relax in order to sleep. There is nothing more frightening than fighting to get your breath. It sounds like your doc is on the right track, but sometimes different medications have to be tried and tweaked to suit the individual. There isn't just one answer. The secret is the best answer for Ken.