mrsD mentioned antihistime above. When I got on this OPC actually Pycnogenol which is a powerful OPC as well, a history of allergy/sinus issues left me. I took antihistime drugs and did the allergy shots etc for so many years and no help. I have not bought a antihistime drug in 20 yrs....grape seed ex and pycnogenol are natural antihistimes.

I didn't recall this at the Pycnogenol lecture in 1995, but I do remember hearing, it may prevent cancer. The major reason I got on it. Then found the allergy/sinus issue gone in my body.

http://www.healtharticles101.com/gra...ergies-review/