(Chapter 21) Footnote 62:

Lat. Syropis & Iulepis. This reference, evidently to the sweetened tonics prescribed by ignorant physicians, is omitted from the 1555 edition. Cf. syrupus in the opening sentence of Ch. 39. In using these terms, Vesalius may also be casting a Humanist aspersion on Arabic medicine, from which both words derive. As seen in the Preface, Vesalius was one of many medical reformers from Leoniceno to Paracelsus who criticised unscrupulous pharmacists and the physicians who relied upon their products.