The life and date of the author are quite unknown, but he was probably a late writer.
Potential Confusion with a physician named Anastasius
He is not to be confounded with a Greek physician of the same name, whose remedy for the gout, which was to be taken during a whole year, is quoted with approbation by Aetius (tetrab. iii. serm. 4.47, p. 609), and who must therefore have lived some tine during or before the fifth century after Christ.
The author of a Latin epigram of eighteen lines addressed to a certain Armatus, De Ratione Victus Salutaris post Incisam Venam et Emissum Sanguinem
This is to be found in several editions of the Regimen Sanitatis Salernitanum. (e.g. Antverp. 1557, 12mo.)