Nothing called Perineal postnasal drip. It should be perennial postnasal drip.
perennial = lasting or active throughout the whole year
postnasal drip = mucopurulent discharge from the posterior...
Antihistamines such as Allergy medications (benadryl, zyrtec, cleratine, allegra, etc) do help temporarily by shutting down the mucus production.I've had post nasal drip for over 5 years now, it...