This article mentions Epicurus:
Empirical philosophy begins in Greek medicine, which formulates the first imperative to use experience as an instrument of knowledge, and initiates European thinking about methods of empirical inquiry. Antiquity’s greatest thinker on empirical methods was Galen, its greatest doctor. Many leading empirical philosophers had medical training or studied medical writings and collaborated with physicians. This began when Democritus and Epicurus drew medical empiricism into natural philosophy, but their efforts were swamped by the prestigious rationalism of Plato, Aristotle, and the Stoics. The chapter also considers the empiricism of the Babylonians, and the career of empiricism under Islam.