I uploaded two pages of the book I mentioned. There are suggestions for managing CT......under antitussive agents, Lomotil is suggested and the mode of action explained. It worked for one of my pups and also a friend's pup who had CT.
My last pup with CT was on Temeril P for most of his life and it managed him very well. Like I said, they are each different.
Good luck! Welcome to YT
You can click on the links on this page to read the article...I titled them Lomotil, but it is not what it is all about. Mostly management of CT
www.yorkiehavenrescue.com/lomotil