I'm not sure. Coughing and blowing your nose don't work? I agree that during allergies and colds and such, it's annoying, but you just kinda have to live with it.
As always- None of my statements are evaluated by the FDA.
My advice is not intended to diagnose, treat, cure or prevent any diseases unless prescribed by a health practitioner. All information is provided for educational purposes only and should not replace the advice of your medical doctor.
(but your medical doctor will probably end up killing you