Can ipratropium bromide nasal spray help with post-nasal drip? no runny nose or front nasal discharge, just the drip. not linked to allergy (per ent)

Depends: It depends on the cause for the post-nasal drips. If the nasal drips is not linked to nasal stuffiness, sneezing, or runny nose, one needs to consider other causes (sinus infection for example). If your nose and eyes itch, it is likely from allergy which can confirmed by the history and skin testing. One can't tell whether one has an allergic problem by looking at the nose and throat alone.