Thanks for the info. You did say it was non-irritating but I would like to know if it is safe to use? My dad is already 79 years old and I don't want him using something that will make his condition worse. If that helps widen the blood vessels, then I believe it's key to alleviating my dad's problems with hypertension. Are there any contraindications for that? I have to emphasize that my dad is already sensitive to some drugs. It causes him rashes and itchiness.