The Universal Pharmacopoeia by Michael Ryan, published in 1839, is a comprehensive work that offers a detailed compilation of medical formulations and remedies used in both British and foreign hospitals during the 19th century. This extensive volume serves as a practical guide for medical practitioners of the time, providing them with a wide array of prescriptions and therapeutic strategies. Ryan’s meticulous documentation reflects the medical practices and pharmaceutical knowledge prevalent during that era, making it an invaluable resource for understanding historical medical treatments.​

The book is structured to present a variety of medicinal formulas, encompassing both common and rare treatments. Each formulation is accompanied by precise instructions on preparation and administration, ensuring that medical professionals could replicate the remedies accurately. Ryan’s work not only includes traditional herbal remedies but also integrates chemical and pharmaceutical compounds that were emerging in medical practice at the time. This blend of traditional and contemporary approaches highlights the evolving nature of medical science in the 19th century.​

Furthermore, The Universal Pharmacopoeia offers insights into the global exchange of medical knowledge. By incorporating foreign remedies and practices, Ryan acknowledges the influence of various cultures on the development of medical treatments. This aspect of the book underscores the interconnectedness of medical traditions and the importance of cross-cultural learning in advancing healthcare practices.​

Michael Ryan’s The Universal Pharmacopoeia stands as a testament to the rich history of medical practice and pharmaceutical development. Its comprehensive nature provides a window into the medical world of the 19th century, offering valuable perspectives for historians, medical professionals, and researchers interested in the evolution of medical treatments and the exchange of knowledge across cultures.