I do not like you to use Vibrocil which contains a decongestant which may cause rebound rhinitis. This means that you may worsen the nasal blockage with prolonged use. Only use saline nose drops such as Salex twice day every day for several months and see if he gets better. If he does not improve it is time to see an ENT specialist about his persistently blocked nose. He probably has enlarged and infected adenoids.
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