Is post nasal drip a serious problem?

More-so Annoying. Post-nasal drip is not serious in itself, but it can exacerbate serious problems, primarily in those patients with underlying lung disease like asthma or COPD (chronic bronchitis or emphysema).
Post nasal drip. It is annoying to be sure. It can irritate the back of the throat and collect giving a cough. Thats about the worse it does.