That is why they are the best selling and most trusted materia medicae in homeopathic practice. The Ultimate Prisma Collection from Saltire Books contains the most remedies and the most detailed information of any materia medica, including hundreds of remedies not found in any other text. This work also features the most comprehensive list of remedies, all accurately identified, categorised and described, considerably improved, revised and expanded from Vermeulen's previous works.

To reflect new prescribing practices 'Sensation' entries have been added.These are the tools of our profession - a carpenter would not keep a dull saw, a seamstress would not keep an outdated sewing machine, a cook would not use stale ingredients. To achieve the best results homeopaths must constantly update their reference materials and ensure that they are working with information of the highest quality. A small change in the placement of a plant into a different family, new source details about a mineral or the addition of a new animal remedy can make a huge clinical difference.