The crux of the issue is what is the cause of your chronic cough? Sometimes cough can be multi-factorial and there may be more than one cause. Thus, it might be chronic post-nasal drip and acid reflux. I would suggest that you go to an experienced pulmonologist, allergologist, or ear, nose and throat specialist who specialises in dealing with this problem. Based on the underlying cause/s, effective treatment can then be used. There are lots of nuances regarding which specific types of nasal sprays, how often they are used, how they are combined different antihistamines, use of immunotherapy, etc., etc.
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