That person came into the emergency room with ketoacidosis. This is not good. That means they are going to act like ephedrine. And then you go over the herbal preparation and sure enough there's ephedrine in it. Often herb suppliers will use Chinese or Korean names for the herbal remedies so the person doesn't know what's in them.
Pseudoephedrine has many, many names.
Or people may not realize that kola nut is caffeine. So all of a sudden these people are taking stuff that really jazzes them and they don't know why. Other herbs have actual liver toxicity. One that is well documented is comfrey. Comfrey tea or comfrey eaten as a salad definitely has a risk for inflammation of the liver associated with it.