Monogram bought the story "Tiger Man"--which was originally supposed to be this film's title--from author Andrew Colvin, but when the title was changed to "Voodoo Man", Colvin wasn't given a screen credit.
Shot in seven days beginning October 16 1943, the last of Bela Lugosi's nine Monogram features, but released four months prior to the eighth, Return of the Ape Man (1944).
Ralph addresses his producer as "S.K.". This is an in-joke reference to this film's real producer, Sam Katzman, uncle of Leonard, of Dallas (1978) fame.
The failure of the original copyright holder to renew the film's copyright resulted in it falling into public domain, meaning that virtually anyone could duplicate and sell a VHS/DVD copy of the film. Therefore, many of the versions of this film available on the market are either severely (and usually badly) edited and/or of extremely poor quality, having been duped from second- or third-generation (or more) copies of the film.