Re: Oct. 28 editorial cartoon, showing Rush Limbaugh shouting into a radio microphone, with a technician saying, "He must be off his meds." There is no doubt that the U.S. radio talk-show host Rush Limbaugh's direct style and his own past medication issues make him an inviting target. And although he was, in all probability, technically inaccurate in accusing Michael J. Fox of "acting" in his recent political TV ad supporting a Democratic senatorial candidate, Mr. Limbaugh may have been very close to the mark. As a neurologist with a large number of Parkinson's disease patients, my impression of the...