Serapion the Elder and Serapion the Younger were Syrian Christians who wrote in Arabic. Breviarum medicinae was an abridgement of the opinions of the Greek and Arabic physicians concerning diseases and their treatment. It also includes transcriptions from Alexander of Tralles, an author with whom few of the other Arabic writers seem to have been much acquainted.
Matthaeus Platearius, a physician from Salerno, is thought to have produced a twelfth-century Latin manuscript on medicinal herbs titled "Circa Instans" aka ("The Book of Simple Medicines"), later translated into French as "Le Livre des simples medecines." It was an alphabetic listing and textbook of simples that was based on Dioscorides "Vulgaris", which described the appearance, preparation, and uses of various drugs. Matthaeus Platearius and his brother Johannes were the sons of a female physician from the Salerno school who was married to Johannes Platearius I; it is possible that she was Trotula. ISTC No. is00466000. Digital facsimile from the Bayerische Staatsbibliothek at this link.