The Universal Pharmacopoeia; Or, A Practical Formulary of Hospitals, Both British and Foreign is a comprehensive medical reference work first published in 1839 by Michael Ryan. This third edition, translated from the French editions of Milne-Edwards and Vavasseur, was significantly expanded to include a vast array of medical formulations used across various hospitals, both in Britain and abroad. The book serves as an invaluable resource for medical practitioners, offering detailed prescriptions and formulations that reflect the medical practices of the time.​

The work is meticulously organized, presenting a wide range of medicinal preparations, including tinctures, syrups, and ointments, along with their specific uses and dosages. Each formulation is accompanied by clear instructions, ensuring that medical professionals can accurately replicate treatments. The inclusion of both British and foreign practices highlights the global nature of medical knowledge exchange during the 19th century, providing readers with a broad perspective on therapeutic approaches.​

Ryan’s compilation also emphasizes the importance of standardization in medical treatments. By documenting and disseminating these formulations, the book contributed to the establishment of consistent medical practices, which was crucial for patient safety and the advancement of medical science. It reflects the era’s commitment to empirical research and the systematic organization of medical knowledge.​

The Universal Pharmacopoeia is more than just a collection of medical recipes; it is a testament to the evolving nature of medical science in the 19th century. Through its detailed documentation and comprehensive scope, the book offers a window into the medical practices of the time, underscoring the significance of knowledge sharing and standardization in the pursuit of effective healthcare.