atcapers...like I said...my pup just had postnasal drip and that's what made him cough. He didn't have any congestion at all. I'd try the antibiotics first....but you may want to try this if they don't work:
http://www.1800petmeds.com/pdetail.a...P=&WT=&MG=&PT=
I'm all for trying conventional methods first...but I've had a lot of luck with doing things the "natural" way. I'm so glad he's finally stopped coughing. I still add 2 drops to his food and I'm going to stop them completely next week.