Introduction
Sleep is an essential physiological process necessary for maintaining physical health, cognitive performance, emotional well-being, and overall quality of life. Sleep disorders, particularly insomnia, affect millions of individuals worldwide and are associated with increased risks of cardiovascular diseases, metabolic disorders, anxiety, depression, and impaired daily functioning. In Ayurveda, sleep (Nidra) is considered one of the three Trayopasthambhas (sub-pillars of life), and disturbances in sleep are collectively referred to as Anidra. Among the various Ayurvedic interventions for sleep disorders, Ashwagandha (Withania somnifera) has gained significant attention due to its adaptogenic, anxiolytic, and sleep-promoting properties.1
Ashwagandha in ayurvedic literature
Ashwagandha is one of the most important medicinal plants described in Ayurvedic texts. It is classified as a Rasayana drug because of its rejuvenating, nourishing, and restorative effects on the body and mind. Traditionally, Ashwagandha has been used to improve strength (Bala), vitality, longevity, mental health, and resistance to stress.2
According to Ayurvedic principles, sleep disturbances often result from aggravated Vata Dosha, mental stress, anxiety, excessive sensory stimulation, and depletion of bodily tissues. Ashwagandha helps pacify Vata, nourish the nervous system, and promote mental calmness, thereby supporting healthy sleep.
Mechanisms of action
Modern pharmacological studies suggest several mechanisms through which Ashwagandha improve sleep:
Stress reduction:
Ashwagandha is recognized as an adaptogen that helps the body cope with physical and psychological stress. It reduces cortisol levels and improves stress resilience, which can positively influence sleep quality.
Anxiolytic effects:
Anxiety is one of the most common contributors to insomnia. Bioactive compounds in Ashwagandha, including withanolides, have demonstrated anxiolytic properties that help reduce sleep disturbances associated with anxiety.
Sleep-romoting activity:
Research indicates that triethylene glycol, a natural compound found in Ashwagandha leaves, contribute to sleep induction by promoting non-rapid eye movement (NREM) sleep.3
Neuroprotective effects:
Ashwagandha supports neuronal health, reduces oxidative stress, and modulates neurotransmitter activity, contributing to improved cognitive and psychological functioning that supports healthy sleep patterns.
Contemporary clinical evidence
Several clinical studies have evaluated the effectiveness of Ashwagandha in sleep disorders. Randomized controlled trials have reported significant improvements in sleep onset latency, total sleep time, sleep efficiency, and overall sleep quality among individuals receiving Ashwagandha supplementation. A systematic review and meta-analysis found that Ashwagandha extract significantly improved sleep quality and mental alertness upon waking, with greater benefits observed in individuals diagnosed with insomnia. Clinical studies have also demonstrated reductions in anxiety and stress scores, suggesting that the herb addresses underlying factors contributing to sleep disturbances.
Furthermore, Ashwagandha has shown a favorable safety profile, with most studies reporting only mild and transient adverse effects.
Clinical significance
The therapeutic value of Ashwagandha lies in its holistic approach to sleep management. Unlike conventional hypnotic medications that primarily induce sleep, Ashwagandha addresses stress, anxiety, nervous system imbalance, and overall physiological resilience. This makes it a promising complementary therapy for chronic insomnia and stress-related sleep disorders.
Conclusion
Ashwagandha is a well-established Ayurvedic Rasayana with significant potential in the management of sleep disorders. Its adaptogenic, anxiolytic, neuroprotective, and sleep-enhancing properties support both traditional Ayurvedic concepts and modern scientific findings.4 Current evidence suggests that Ashwagandha can improve sleep quality, reduce insomnia symptoms, and enhance overall well-being. Further large-scale clinical studies are warranted to strengthen the evidence base and facilitate its integration into contemporary sleep medicine.
- Cheah KL, Norhayati MN, Husniati Yaacob L, Abdul Rahman R. Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis. PLoS One. 2021;16(9):e0257843. Published 2021 Sep 24. doi:10.1371/journal.pone.0257843 https://pmc.ncbi.nlm.nih.gov/articles/PMC8462692/
- Langade D, Thakare V, Kanchi S, Kelgane S. Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients: A double-blind, randomized, parallel-group, placebo-controlled study. J Ethnopharmacol. 2021;264:113276. doi:10.1016/j.jep.2020.113276 https://pubmed.ncbi.nlm.nih.gov/32818573/
- Deshpande A, Irani N, Balkrishnan R, Benny IR. A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults. Sleep Med. 2020;72:28-36. doi:10.1016/j.sleep.2020.03.012 https://pubmed.ncbi.nlm.nih.gov/32540634/
- Langade D, Kanchi S, Salve J, Debnath K, Ambegaokar D. Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-blind, Randomized, Placebo-controlled Study. Cureus. 2019;11(9):e5797. Published 2019 Sep 28. doi:10.7759/cureus.5797 https://pmc.ncbi.nlm.nih.gov/articles/PMC6827862/