How would you evaluate the general competence of an herbalist? I've been hesitant because I'm afraid of getting someone who'll claim to have a grasp of things like medication interactions and not actually have it. I definitely don't trust my doctor to have any clue on the subject.

I'd be curious, though, to see if an herbalist would have an opinion on the aspect of my big asthma troubles that has made some doctors think I'm crazy-- Before I started taking Singulair, often my first cold symptom would be my chest getting tight, even for colds that started in my sinuses.