I'm really concerned about my dad's cough. He's had it for about six months now, and it's mostly when he's lying down, but there's no fever. Besides that, he's dealing with high blood pressure, diabetes, and some heart issues. He's been on c furo cv 625 antibiotics for a couple of days, which seems to help a bit, maybe 40 percent better. But what else can we do? Any advice or other medicines you think would help?