1 doctor weighed in:

How long until an antihistamine works on post nasal drip?

1 doctor weighed in
Dr. Luis Villaplana
Internal Medicine

In brief: THEY WON'T HELP MUCH

Other than drying it up a bit and thickening it, which can cause cough.
The key in trying to eliminate postnasal drip is to cut the inflammatory or environmental response that it is caused by.

In brief: THEY WON'T HELP MUCH

Other than drying it up a bit and thickening it, which can cause cough.
The key in trying to eliminate postnasal drip is to cut the inflammatory or environmental response that it is caused by.
Dr. Luis Villaplana
Dr. Luis Villaplana
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