I understand how exhausting this persistent dry cough is, especially since it is disrupting your sleep after your recent throat infection treated with Azee 500. It is quite common for airways to remain hypersensitive and irritated after an infection, leading to a lingering post-infectious cough. Since home remedies and over-the-counter options like Hamdard Sualin haven't worked, you may benefit from prescription-strength cough suppressants, such as dextromethorphan, or a mild inhaler to soothe airway inflammation. I highly recommend consulting your doctor so they can examine your lungs, rule out post-nasal drip, and prescribe the appropriate targeted medication to help you finally rest.