I’ve always been curious if Doc Holliday, being from Georgia, May have used rabbit tobacco to ease the symptoms of his tuberculosis. Many of the old Appalachian doctors that I’ve read about would prescribe rabbit tobacco for their patients that had tuberculosis. Some going as far as claiming that rabbit tobacco was a cure for tuberculosis....of course it was not a cure, but it would help with the cough and lung pain, being a sedative... They would drink this as a tea.... Many Native American Tribes also used rabbit tobacco. They claimed it had healing and spiritual powers. They would smoke it.
I’ve never seen a reference to Doc Holliday using rabbit tobacco, but it’s something he may have come across in his time.
http://www.bloodandspicebush.com/blog/life-everlasting-and-the-beauty-of-rabbit-tobacco