Bonnie is on Lasic and vetmedin. Last time i was there about 2 weeks ago with the cough he said we were running out of options.
Heard that of Izzy, who went on for 18 more months. His cough, brought on by exertion, didn't really bother him and his most obvious problem was rapid breathing, but except for two flare ups during hot weather , when he got Vetmedin, then more Vetmedin, this didn't bother him either. I took him to the vet twice , expecting the worst and being given a second chancd, so I dearly hope it's the same for you.
Monty's cough (more today, actually) is first thing, brief and doesn't bother him at all.
Monty is on Fortekor and Frusemide. Izzy was on Fortekor, then Fortekor with Vetmedin and eventually with Frusemide, as he had little fluid buildup, until his last months.
Monty has coughed a couple of extra times today, but I notice that the atmosphere has changed. A change whether good to bad or vice versa weather, always affected Izzy and a friend's poodle. When Izzy got to needing Frusemide, I used to increase his dose for a few days, if his symptoms lasted more than 24 hours. The vet said this was the thing to do, as he was taking a dose well below the safety level.