re: beverage - herbal tea
before anyone blows up at me, I give people the tea bag still in the wrapper-thing that usually has ingredients listed and steeping directions
I know herbal tea can cause weird medical interactions
this time in particular I gave some herbal tea to my neighbor who used to work in the medical industry
I think she would know what does or doesn't interact with any medications she might be taking
normally I would advise people look at the ingredients before drinking it