This contribution deals with the so-far unknown regimen sanitatis written for the emperor Charles IV. by his physician Reimbotus Eberhardi de Castro in 1360. The author points out that the only copy of this work, preserved in the autography (Biblioteca Apostolica Vaticana, Pal. Lat. 1349, fol. 143r–160r), is merely an unfinished draft which was probably never presented to the emperor. The article also discusses its only source, Galen’s treatise De regimine sanitatis in the Latin translation of Burgundius of Pisa from the second half of the 12th century, and describes how Reimbotus handled this model. The article is an addendum to the Latin edition and Czech translation of this regimen which was published in 2010 in MILADA ŘÍHOVÁ ET ALII, Lékaři na dvoře Karla IV. a Jana Lucemburského [Physicians at the Court of Charles IV. and John of Luxembourg], Praha, Paseka 2010, pp. 124–168.