(Πολύαρχος), a Greek physician, who is mentioned by Celsus (De Med. 5.18.8, 8.9.1, pp. 86, 177), and must, therefore, have lived in or before the first century after Christ. He appears to have written a pharmaceutical work, as some of his prescriptions are several times quoted by Galen (De Compos. Medicam. sec. Loc. 8.5, vol. xiii. pp. 184, 185, 186, De Compos. Medicam. sec. Gen. 7.7, vol. xiii. p. 981), Aetius (2.4. 57, 3.1. 34, 3.2. 14, pp. 415, 481, 530), Marcellus (De Medicam. 100.20, p. 339), and Paulus Aegineta (De Re Med. 3.68, 70, 74, 7.18, pp. 486, 487, 489, 684); but of his writings only these extracts remain.