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In response to Matt Klompstra: The acting-out-dreams disorder is described in Schenck, C.H. et al. Sleep, 1986, v9, pp.293-308, and in Annals of Neurology,1992, v32, pp. 3-10. Schenck I believe is at the U. Minnesota med school and has produced a videotape of the disorder. I don't know if the tape is generally available. In response to Barb Colmery: The drug used to treat the disorder (I believe it is Klonopine, or possibly Klonopin) is an anti-seizure CNS depressant. I believe that the successful treatment of the disorder is accomplished with one small dose on retiring (for the night, not from your job). The PDR lists various drug interactions, such as with other CNS depressants. It is my impression that many neurologists may not be familiar with this disorder, and that its relationship to PD and/or the drugs used to treat PD is not generally known, if it in fact exists. This disorder occurs during REM sleep, and REM sleep occurs predominately in the last half of the sleep period. In healthy individuals, the first REM period occurs an hour to an hour-and-a-half into the sleep period and is generally short (10 minutes or so). Subsequent REM periods occur on the average every 90 minutes and get longer. I have found in my case that my active episodes are clearly related to dream content, as is my sleep-talking.