Can drinking too much herbal tea containing artificial sweetener be harmful?

Too much: Of anything can be a problem. I'm not worried about the sweetener, although some do. I don't know what's in the herbal tea and whether it could be harmful in large amounts. In fact, i don't even know what amount you're drinking, which makes it impossible to answer the question. Herbs can interact, however, with both prescription and otc medication in potentially harmful ways.