Hi mirsy. I recently had surgery and coughing would not be a good thing. I nebbed the morning of the surgery and skipped the PM session. I usually do 1/2 vile of 7% sod chlor and 1/2 vile of the 3% and use the most powerful compressor I have. The next morning after the surgery I only used 3% sod chlor and used a "weaker" compressor. This worked great and there was very little coughing. About 2 weeks post op I went back to my old routine and coughing returned--only during the session which was normal. It was obvious I needed to get back on the old routine as the first day I coughed out green and brown stuff. Best to your husband.