dogmatic
adj.describing someone who believes their own ideas are always right and refuses to listen to other opinions. In medicine, it can also describe a treatment that is used without enough proof.
adj.characterised by an inflexible adherence to a set of beliefs or principles, often without room for doubt or alternative views. In a medical context, it refers to the use of a treatment based on tradition or authority rather than on scientific evidence.
“He was too dogmatic to accept any new ideas.”
“The doctor was criticized for his dogmatic approach to the patient's care, ignoring the latest research on the condition.”
“While some argue that a certain level of dogmatism is necessary for effective leadership, in the field of medicine, such rigidity can lead to the rejection of life-saving innovations.”
From Middle French dogmatique and its etymon, Late Latin dogmaticus, from Hellenistic Ancient Greek δογματικός (dogmatikós, “didactic”), from δόγμα (dógma, “dogma”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.