My 70-year-old father has had nearly constant coughing for the past two months, worse at night. Although it improves briefly 2-3 times, it returns every 3-4 days, especially with weather changes. He's tried antibiotics like Novamox and Azithromycin with no improvement. Should he seek further diagnosis or explore alternative treatments? To be noted no apetitle or weight loss so far. It's seems to be more weather related, but still looking for opinions...