Cocaine in your cough drops, tobacco in your toothpaste. Internist Dr. Lydia Kang tells us about mystifying medical practices of yesteryear. Her new book is, “Quackery: A Brief History of the Worst Ways to Cure Everything”.Dr. Kang will be speaking on Thursday at the Maryland State Library for the Blind ---- Physically Handicapped at 415 Park Ave, Baltimore, at 6:30 pm.