I am currently taking methadone as part of my treatment for chronic pain. I would like to know if zonatuss (benzonatate)- a drug that my doctor and I discussed to treat a severe cough. The other narcotic cough syrups I have tried don t work all that well, and they tend to keep me from sleeping. I have had this sinus/upper respiratory infection for a week and a half , gotten 2 steroid injections, taken it easy during most of that time, and I am still coughing so much, I was told, by my dr., that I had tracheitis, and I am looking for some relief. Answers, please? Thank you so much for you kind consideration...