Can I do harm by using a nasal decongestant spray?

ARIA Masterclass Brussels 2018

Nasal decongestant sprays are well recommended for short-term use when having a cold that is often viral or when a patient is suffering from allergic rhinitis and having a stuffy nose or nasal obstruction. It is also recommended for these nasal decongestant sprays not be used for more than 10-12 days because of the strong potency of these sprays.

These interviews with Prof. Peter Hellings (Belgium) and Prof. Dr Joaquim Mullol (Spain) were recorded during the ARIA masterclass on 12 September 2018 in Brussels, Belgium.