Pedersen, a Danish canon, humanist scholar, writer, printer and publisher, wrote and published the earliest medical book issued in Scandanavia by a Scandanavian writer. Translated as "A useful doctor book for poor and rich, young and old," Pedersen's book would be characterized as folk or popular medicine, inspired by Dioscorides. When he published this book Malmø was a Danish city.

Petersen issued a second book, "On herbal extracts" in 1534. According to Stokker, Remedies and rituals: Folk medicine in Norway and the new land (2007) p. 111, Pedersen's two works together contained "250 medical herbs, 140 of them domestic."