Isekai Yakkyoku

Pharmacological researcher Kanji Yakutani devoted his life to medicine after losing his younger sister to an illness treatment could not save, only to die himself from overwork. He awakens in another world as Falma de Medicis, a child from a prestigious family of royal pharmacists, carrying both his previous medical knowledge and a divine ability that lets him understand and create substances. Falma quickly discovers that medicine here relies on outdated beliefs and that effective care is treated as a privilege of the wealthy. Refusing to accept that system, he applies modern science and careful diagnosis to open a pharmacy for ordinary people, challenging monopolies, superstition, and the social limits placed on who deserves treatment.