Most studies agree that post-nasal drip syndrome (PNDS), asthma, gastroesophageal reflux
disease (GORD), and laryngopharyngeal reflux (LPR) are the commonest causes of chronic
cough in the immunocompetent, non-smoking patient who is not taking an angiotensin-
converting enzyme inhibitor. No diagnostic test has been found to define those who are said
to have PNDS other than a response to a first-generation antihistamine. Examining the
available evidence suggests that mechanical stimulation of the pharynx by mucus is not an …

We enjoyed reading the recent article'The aetiology of chronic cough: a review of current
theories for the otorhinolaryngologist'by J O'Hara and NS Jones. 1 In this highly relevant and
important review, the authors provided both an excellent summary of the main causes of
chronic cough and a good management algorithm to deal with the majority of patients
suffering from this common symptom. In addition, they reminded ENT surgeons of the need
to consider post-nasal drip syndrome, asthma and gastroesophageal (supine) reflux or …