Pharmacognostic Study of Yasamrak Formula

Abstract

Yasamrak is a Thai traditional herbal formula comprised of 3 medicinal plants e.g. Lodthanongdaeng (root), Phayarakdeaw (root) and Phayafii (stem). The medicine is commonly known and used for treatment of drug addiction by traditional healers especially in the Central and the North-East part of Thailand. Four samples of Yasamrak were collected, extracted and identified by comparison microscopic characters with the thin layer fingerprints of authentic plants. The results showed that four samples of Lodthanongdaeng and Phayafii were same species of Diospyros lanceifoliaRoxb. And  Trigonostemon reidioides (Kurz) Craib, respectively when compared to the authentic plants. The fingerprints of Phayarakdeaw were little difference when compared to each other and authentic plant. Therefore, the other techniques should be used for further investigation in order to identify the collecting samples.