In order to create medicine, a diverse amount of herbs are often required to be crushed, processed, fused, added profound energy for additional effects, etc. This process was not only complicated but would also, unavoidably, cause a certain amount of medicinal force to be lost. Furthermore, it was certain that there would always be a probability of failure. Especially when it comes to high grade medicine, not only was a huge amount of gold needed to purchase the rare ingredients, the chances of failure was extremely high as well and, once you fail, everything would be gone. In addition, not everyone had the ability to make the higher grades of medicine. There was a very high requirement for the ability of the alchemist, the cauldron, the ambiance, and the effects added using profound energy.