The use of Prickly Chaff Flower (Achyranthes aspera) for insomnia is justified primarily by traditional medicine rather than robust scientific evidence. In traditional Ayurvedic and folk medicine, Prickly Chaff Flower has been used for a variety of ailments, including as a sedative or calming agent to address issues like insomnia and restlessness. Ancient texts and ethnobotanical surveys sometimes list the plant among those recommended for sleep-related disturbances, typically as part of polyherbal formulations or decoctions.

However, there is very limited scientific research specifically examining the efficacy of Prickly Chaff Flower for insomnia. Most available studies focus on its anti-inflammatory, analgesic, and antimicrobial properties, rather than its effects on sleep. While a few animal studies have hinted at potential central nervous system effects, these are insufficient to draw conclusions about its sedative or hypnotic activity. There are no well-designed clinical trials evaluating its use for insomnia in humans.

In summary, the use of Prickly Chaff Flower for insomnia is primarily supported by tradition, with little to no scientific validation currently available. The overall quality and quantity of evidence for its use in insomnia is very low.