Which of these options is not recognized as a cause of chronic cough?

Which of these options is not recognized as a cause of chronic cough?

a) Gastro-oesophageal reflux disease

b) Angiotensin Converting Enzyme (ACE) inhibitors

c) Long-term smoking

d) Sodium valproate

back:

Chronic cough is not just caused by respiratory conditions but the anti-epileptic drug, sodium valproate, has not been implicated.