#Sophoraexigua

For centuries, Thais have turned to the earth for remedies, drawing healing from roots and herbs used by traditional healers. Among the constellation of Thailand’s ancient plant medicines, “Phitsanat” (พิษนาศน์), known in scientific parlance as Sophora exigua Craib, holds a special place in the country’s folk pharmacopoeia. Also recognized by a bouquet of names such as แผ่นดินเย็น, นมราชสีห์, and สิบสองราศี, Phitsanat’s journey from rural village gardens and temple courtyards into the realm of modern pharmacology is a paradigm of the enduring dialogue between tradition and science. Today, as Thailand seeks to harmonize its cultural heritage with advancements in healthcare, Phitsanat is once again in the spotlight—this time, not just through the whispered wisdom of healers, but under the scrutiny of laboratory lights.

Phitsanat, a revered root in Thai folk medicine, sits at the crossroads of heritage and modern science. Known scientifically as Sophora exigua Craib, this plant has long been part of village healing practices across central Thailand and the Isan region. Today, researchers are revisiting Phitsanat to understand its bioactive compounds and potential health benefits, while Thai communities weigh its place in future healthcare.

A Root with Deep Traditional Roots

Historically, Phitsanat’s dried root was a prized ingredient in multi-herb decoctions used for fever, skin conditions, and postpartum recovery. Healers, or Mor Baan, prepared tonics by simmering the root and applied pastes for skin ailments in children. The plant’s name translates to a notion of cooling, reflecting a traditional belief in balancing inner “heat” to support wellness, a concept common in Thai therapeutic systems. In official Thai healing traditions, Phitsanat has appeared in blends recognized for essential remedies, underscoring its cultural significance within the country’s health landscape.