Sleepytime & tension tamer tea by celestial seasoning, any risks for high blood pressure or drug interactions?ragweed allergy should i avoid chamomile

No problem: I have not found any ingredient in these herbal tea which would cause hypertension. As for ragweed allergy, you are actually allergic to the airborne pollen and not to the flower itself. Even if the chamomile pollen in the flower cross-react with ragweed, it will be highly unlikely to cause you allergic symptoms given that the chamomile would have been subjected to processing and heating .