I have a similar situation as you. Congestion, hoarse voice, laryngitis, post nasal drip, throat clearning, nonproductive cough, etc... Been on 80 mg of zegerid/ day (2 40mg capsules) Does great taking care of my heartburn (I had erosive gastitis and erosive esophagitis), but has done nothing for the congestion and the cough. I went to an allergist last week; she dx me with mild allergic rhinitis and put me on nasonex--then told me my bigger problem with LPR (reflux above the esophagus). Major issue, though, is that zegerid (or any of the PPIs for that matter) do NOT fix reflux. Reflux is an anatomical problem (faulty LES, etc...). It can be treated short-term with drugs like reglan that force the esophagus to contract to hold the stomach contents down, but reglan is NOT a long-term drug. The only thing that will help, from what I understand, is the reflux surgery (nissen fundoplication), which I'm not prepared to agree to right now. For me, I'm willing to suck it up and deal for right now, just using behavior modification solutions (like raising the bed and not eating 3 hours prior to bedtime, not exercising after I eat, etc...).
I can tell you, however, that my mother had this reflux problem that got progressively worse over the years. She eventually had to sleep sitting straight up and routinely aspirated stomach contents into her lungs. She developed intersitital lung disease and died 2 years from dx. Reflux was not the only factor that contributed to her lung disease, but her pulmonologist told her that it was certainly a major player. I had a pulmonologist tell me the same thing last year (the relationship between reflux and ILD). I'm going to wait it and see what happens since, in my case, allergies are also contributing. The nasonex has helped greatly with the cough, but I still get very congested and have a lot of throat clearing, sore throat, and hoarse voice. If it gets worse over time, I'll follow up with an ENT because I believe they're better equipped to deal with something like LPR than a GI doctor.
Current dx: Rheumatoid Arthritis
Suspected dx: UCTD/Early Lupus
Current Meds: Enbrel, Plaquenil, Aciphex, Ultracet, Zyrtec, Allavert-D, Zantac, Tylenol PM
Past Meds: Relafen, Vioxx, Mobic, Voltaren, Sulfasalazine, Entocort, Prednisone, Humira, Reglan