The term "ancient medicine" is often perceived as tantamount to Greek medicine, as most medical writings from the classical period originate in Greece. These texts later became the basis of Western medical thought. Even though the Romans adopted Greek medicine, it continued to be alien to them; they persisted with their practical approach to medicine alongside the Greeks' more theoretical view. This article deals with how Romans reacted to the invasion of Greek doctors, and how this is portrayed by contemporary Roman authors, especially Pliny and Celsus.