Lebbek (Albizia lebbeck), also known as "Siris" or "East Indian Walnut," is a tree used in traditional medicine systems, particularly in Ayurveda and Unani medicine. Its bark, leaves, and seeds are cited for a variety of uses, including as an astringent, anti-inflammatory, and in the management of respiratory conditions. The use of Lebbek for "chills" appears to be rooted primarily in traditional practice, where "chills" may refer to febrile conditions or shivering associated with febrile illnesses. Texts such as the Ayurvedic Pharmacopoeia of India mention Albizia lebbeck bark and leaves for general anti-inflammatory and antimicrobial properties, but do not specifically address chills as a primary indication.

There is minimal scientific research directly linking Albizia lebbeck to the treatment or prevention of chills. While some studies have explored its antipyretic (fever-reducing) and immunomodulatory activity in animal models, these effects are not robustly validated in human clinical trials, nor are they specifically tied to the management of chills. Thus, the evidence rating is low, and its use for chills is best described as a traditional application rather than one supported by significant scientific validation.