I’ve been using Pepcid for about a month because I had a couple of obvious episodes of reflux. I don’t get up much mucus and can’t address if it helped that, but believe the side effect risks is less than risks from reflux for me. I’ve added other reflux precautions. Reflux isn’t a constant issue for me and I tolerate Pepcid.

One thing I look at when checking out a drug’s side effects is percentage of patients who reported them. If 1-5% reported the side effect, 95-99 did not and my odds are good. I also keep in mind that manufacturers often list all issues patients report even when it may not be drug related. If I still have questions, I discuss benefits vs risks with the doc. In years past, we decided once that watchful waiting for an odd organism was appropriate rather immediate antibiotics. Longer ago, doc advised (kindly) that I should risk tendon issues that were well known because treating the respiratory infection with best antibiotic was more important than running. I mention these because looking at the lists of side effects can sometimes be overwhelming and I believe it’s worth discussing risk/ benefit with trusted doc.
Hugs to you-
that amount of mucus sounds overwhelming.