supplementOTC supplementRestricted in Denmark; liver-injury advisories issued in several EU countries
AshwagandhaBenefits, Dosage & Interactions
Ashwagandha (scientific name: Withania somnifera) is an ancient medicinal herb known for its adaptogenic properties. It is commonly used in Ayurvedic medicine, a traditional system of medicine from India. Research on Ashwagandha focuses on cognition and mood, sleep quality, and menopause symptoms.
Researched by DoseRoutine R&D TeamReviewed for accuracy by Nicholas Alexander, RSELast updated
Evidence: Moderate — One published human randomized trial; results not yet replicated.
Evidence strengthModerate · 3/4
PreclinicalStrong human evidence
One published human randomized trial; results not yet replicated.
Plasma half-life
Not applicable
Typical timing
evening
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- 250 mg/day and 600 mg/day of a standardized root extract were the studied amounts[1]
- Route studied
- Oral[1]
- Frequency
- Daily, split into two doses in the trial[1]
- Cycle length
- 8 weeks[1]
- Half-life
- Not established for the whole extract in humans[1]
- Storage
- Room temperature, dry[1]
Reported for Ashwagandha in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Ashwagandha entry is written from. Each number matches an inline marker above.
- [1]An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extractSalve J, Pate S, Debnath K, Langade D · Medicine (Baltimore) · 2019 · Peer-reviewed · PMID 31517876
How to track Ashwagandha doses
Tracking Ashwagandha well takes four fields and a habit. Here is what to record so the log is still useful in three months.
- 1
Add the dose and unit
Log Ashwagandha with its dose in mg so totals stay comparable over time — including days when you split the dose or skip it.
- 2
Set the time of day and food rule
Typical timing is evening. Reminders fire at that time and can export to your calendar.
- 3
Check it against the rest of the stack
Run Ashwagandha through the interaction checker against everything else in the routine — supplements, peptides, hormones and prescriptions — before it becomes a daily habit.
- 4
Log adherence, not intentions
Mark each dose taken, skipped or delayed as it happens. Weeks of honest logs are what make an adherence rate or a trend line meaningful; retrospective guessing is not.
- 5
Review against outcomes
Review Ashwagandha alongside your logged metrics and any relevant blood work every few weeks before changing the dose, so the change is a response to data rather than to a good or bad day.
What to log each time
- Dose in mg
- Time of day
- Taken / skipped / delayed
- Any side effects or notable changes
What is Ashwagandha studied for?
What is Ashwagandha?
Ashwagandha (scientific name: *Withania somnifera*) is an ancient medicinal herb known for its adaptogenic properties. It is commonly used in Ayurvedic medicine, a traditional system of medicine from India. The plant is a small shrub with yellow flowers, native to India and North Africa. Extracts or powder from the plant's root or leaves are used for various health purposes. Ashwagandha is often classified as an adaptogen, meaning it is believed to help the body manage stress. Adaptogens are non-toxic plants that are proposed to help the body resist various stressors, whether physical, chemical, or biological. (NIH National Center for Complementary and Integrative Health).
The term 'ashwagandha' literally translates to 'smell of the horse,' referring both to its unique scent and its traditional association with imparting the strength and vitality of a horse. It has been used for thousands of years to support overall health and well-being. Modern scientific inquiry has begun to explore the traditional uses of this herb, focusing on its potential effects on stress, anxiety, cognitive function, and other areas of health. (Examine.com)
What does the research say about Ashwagandha?
Tap a section to expand.
Ashwagandha's mechanisms of action are attributed primarily to its active compounds, known as withanolides. These steroid lactones are believed to be responsible for many of the herb's observed effects. (PubChem).
Key proposed mechanisms include:
* **Modulation of Stress Response:** Withanolides may interact with neurotransmitter systems, including GABA (gamma-aminobutyric acid) receptors, which are involved in regulating anxiety. It is also thought to influence the hypothalamic-pituitary-adrenal (HPA) axis, which is the body's central stress response system. By potentially modulating the HPA axis, ashwagandha may help regulate the release of cortisol, a primary stress hormone. (NIH National Library of Medicine).
* **Antioxidant Activity:** Ashwagandha contains several compounds with antioxidant properties, which can help protect cells from damage caused by free radicals. This antioxidative effect may contribute to its broad-spectrum health benefits. (Examine.com).
* **Anti-inflammatory Effects:** Some studies suggest that ashwagandha possesses anti-inflammatory properties, potentially by inhibiting the production of inflammatory mediators. This could be beneficial in conditions characterized by chronic inflammation. (Cochrane Library).
* **Neuroprotective Effects:** Research indicates that withanolides may have neuroprotective properties, potentially by promoting the growth of nerve cells and protecting against neuronal damage. This is an area of ongoing study regarding its potential impact on cognitive function. (NIH National Library of Medicine).
It is important to note that many of these mechanisms are still under investigation, and the full scope of ashwagandha's biological activities is not yet completely understood. (Examine.com)
Ashwagandha has been traditionally used for a wide range of conditions, and modern research is exploring several potential benefits. It is important to remember that while some traditional uses are supported by emerging research, more robust human clinical trials are often needed to confirm these effects.
* **Stress and Anxiety Reduction:** Ashwagandha is perhaps most recognized for its adaptogenic properties, which may help the body cope with stress. Several human studies suggest that it can significantly reduce perceived stress and anxiety levels, potentially by lowering cortisol levels. (Cochrane Library).
* **Improved Sleep Quality:** Some individuals report improved sleep quality after taking ashwagandha. This benefit is often linked to its stress-reducing effects, as reduced stress may contribute to better rest. (Examine.com).
* **Cognitive Function:** Preliminary research indicates that ashwagandha may support various aspects of cognitive function, including memory, attention, and information processing speed, particularly in individuals experiencing stress or mild cognitive impairment. (NIH National Library of Medicine).
* **Physical Performance and Strength:** While not its primary use, some studies have shown that ashwagandha may enhance muscle strength and recovery, as well as improve cardiorespiratory endurance in healthy adults. (Examine.com).
* **Hormonal Balance (specifically testosterone in men):** Certain clinical trials have reported that ashwagandha supplementation may increase testosterone levels in men, especially those who are experiencing stress or have reduced fertility. (Cochrane Library).
* **Immune System Support:** Traditional uses include immune system modulation, and some *in vitro* and animal studies suggest it may enhance immune cell activity. Human research in this area is still limited. (NIH ODS).
Individual responses to ashwagandha can vary. It is important to consult with a healthcare professional to determine if ashwagandha is appropriate for your specific needs. (Mayo Clinic)
The evidence for ashwagandha's benefits ranges from traditional use to preclinical studies and human clinical trials, with varying levels of robustness across different indications.
* **Stress and Anxiety:** A significant body of evidence, including several double-blind, placebo-controlled human trials, supports ashwagandha's role in reducing stress and anxiety. For instance, a 2012 study published in the *Indian Journal of Psychological Medicine* found that a high-concentration full-spectrum ashwagandha root extract significantly reduced scores on stress assessment scales and lowered serum cortisol levels in chronically stressed adults. Similar findings have been reported in other systematic reviews and meta-analyses. (Cochrane Library, Examine.com)
* **Sleep:** Evidence for improved sleep quality is growing. A meta-analysis published in *PLoS One* (2021) concluded that ashwagandha root extract has a beneficial effect on sleep in adults, including improving sleep onset latency, sleep efficiency, and sleep quality, particularly in individuals with insomnia. (NIH National Library of Medicine)
* **Cognition:** Research into ashwagandha's nootropic effects shows promise. A randomized, double-blind, placebo-controlled study in the *Journal of Dietary Supplements* (2017) demonstrated improvements in memory, attention, and executive function in adults with mild cognitive impairment. Further studies are investigating its potential in healthy adults. (NIH ODS)
* **Physical Performance:** A review of studies on ashwagandha and athletic performance, including one published in the *Journal of the International Society of Sports Nutrition* (2016), indicated that ashwagandha supplementation may enhance muscle growth, strength, and aid in recovery after exercise in some populations. (Examine.com)
* **Testosterone (in men):** Several studies have observed an increase in testosterone levels in men. A 2010 study in *Fertility and Sterility* found that ashwagandha root extract improved sperm quality in infertile men, with an associated increase in serum testosterone. Another study in *Clinical Therapeutics* (2019) in healthy, overweight men undergoing resistance training also noted increased testosterone. (Examine.com)
While promising, many studies utilize specific standardized extracts, and results may not be generalizable to all ashwagandha products. The long-term effects of ashwagandha in specific populations are still being investigated. (NIH ODS, Examine.com)
Ashwagandha is generally considered safe for most people when taken orally for short to medium durations. However, some individuals may experience mild side effects. (Mayo Clinic).
Commonly reported side effects can include:
* Gastrointestinal upset: Diarrhea, nausea, stomach pain, or vomiting.
* Drowsiness: Due to its potential calming effects, some individuals may feel drowsy, especially at higher doses.
* Headache.
Less common side effects might include:
* Liver problems: Although rare, there have been isolated reports of liver injury in individuals using ashwagandha, particularly in those with pre-existing liver conditions or when used in combination with other substances. (NIH National Library of Medicine).
* Thyroid hormone fluctuations: Ashwagandha may affect thyroid hormone levels, potentially increasing them in some individuals. This could be a concern for those with thyroid disorders. (Examine.com).
If any side effects occur, it is advisable to discontinue use and consult a healthcare professional. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
While generally well-tolerated, several warnings and precautions should be considered before using ashwagandha. (MedlinePlus).
* **Pregnancy and Breastfeeding:** Ashwagandha should be avoided during pregnancy due to historical evidence suggesting it may induce abortions and its potential to cause early delivery. There is insufficient reliable information about the safety of taking ashwagandha during breastfeeding, so it is best to avoid use. (Mayo Clinic).
* **Autoimmune Diseases:** Individuals with autoimmune diseases such as rheumatoid arthritis, lupus, Hashimoto's thyroiditis, or multiple sclerosis should exercise caution. Ashwagandha may stimulate the immune system, which could potentially worsen symptoms of autoimmune conditions. (NIH ODS).
* **Surgery:** Ashwagandha may cause central nervous system depression and might slow down the central nervous system. It could also interfere with blood sugar levels and blood pressure. It is generally advised to stop using ashwagandha at least two weeks before a scheduled surgery to avoid potential interactions with anesthesia or other medications. (MedlinePlus).
* **Diabetes:** Ashwagandha may lower blood sugar levels. Individuals with diabetes who are taking medication should monitor their blood glucose closely and consult their doctor to avoid hypoglycemia. (Examine.com).
* **Blood Pressure:** Ashwagandha may lower blood pressure. Those with low blood pressure or individuals taking medications to lower blood pressure should use it with caution to avoid hypotension. (Examine.com).
* **Thyroid Disorders:** As ashwagandha may increase thyroid hormone levels, individuals with hyperthyroidism or those taking thyroid hormone medication should use it with extreme caution and under medical supervision. (NIH ODS).
This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha is contraindicated in certain populations or under specific medical conditions to prevent adverse events. (DrugBank).
* **Pregnancy:** Ashwagandha is contraindicated in pregnant women due to historical use as an abortifacient and potential risks of miscarrying. (Mayo Clinic).
* **Breastfeeding:** Due to a lack of sufficient safety data, ashwagandha is contraindicated in breastfeeding mothers. (MedlinePlus).
* **Known Allergy or Hypersensitivity:** Individuals with a known allergy or hypersensitivity to ashwagandha or any components of the plant should not use it. (DrugBank).
This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha may interact with certain medications and other substances, potentially altering their effects or increasing the risk of side effects. (MedlinePlus).
* **Immunosuppressants:** Given ashwagandha's potential to stimulate the immune system, it should not be used with immunosuppressant medications (e.g., azathioprine, cyclosporine, prednisone) as it may reduce their effectiveness. (NIH ODS).
* **Sedatives/Anxiolytics:** Due to its central nervous system depressant effects, combining ashwagandha with sedatives (e.g., benzodiazepines like lorazepam, alprazolam; barbiturates; zolpidem) or other anxiolytic medications may cause excessive drowsiness or sedation. (Examine.com).
* **Thyroid Hormone Medications:** Ashwagandha may increase thyroid hormone levels. Taking it concurrently with thyroid hormone replacement therapy (e.g., levothyroxine) may lead to excessive thyroid hormone levels. (NIH National Library of Medicine).
* **Blood Sugar-Lowering Medications:** Ashwagandha may decrease blood sugar. Combining it with antidiabetic drugs (e.g., insulin, metformin, glipizide) could lead to dangerously low blood sugar (hypoglycemia). (Examine.com).
* **Blood Pressure-Lowering Medications:** Ashwagandha has been shown to lower blood pressure. Taking it with antihypertensive medications (e.g., amlodipine, lisinopril, hydrochlorothiazide) might result in excessively low blood pressure (hypotension). (MedlinePlus).
* **Alcohol:** Ashwagandha can cause drowsiness and slow the central nervous system. Combining it with alcohol can intensify these effects, leading to increased sedation and impaired coordination. (DrugBank).
Always inform your healthcare provider about all supplements and medications you are taking to avoid potential interactions. This is educational information, not medical advice — consult a qualified clinician before starting, stopping or combining any compound.
Ashwagandha is commonly studied for oral use, typically in powder or extract form. While the 'typical timing' describes a general pattern, individual needs vary — talk to a licensed clinician.
Ashwagandha is generally considered effective regardless of whether it is taken with or without food. Some people prefer to take it with food to minimize the chance of mild stomach upset.
Due to its potential to promote feelings of calm and improve sleep quality, ashwagandha is often suggested for **evening** use, or even before bedtime. However, some individuals may take it in the morning or split the dose throughout the day, particularly if using it for stress management throughout the day or for physical performance benefits. Consistency in timing is often emphasized for observing sustained effects. (Examine.com)
What interacts with Ashwagandha?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Any glp1 + supplement | Note | Category ruleConfidence: theoretical | GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.Source pending | Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider. |
| Any supplement + medication | Note | Category ruleConfidence: theoretical | Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).Source pending | Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist. |
| Levothyroxine | Note | Compound pairConfidence: theoretical | Ashwagandha can raise T4/T3 levels and may amplify thyroid medication effect.Source pending | Monitor TSH when starting ashwagandha on levothyroxine. |
| Zolpidem | Note | Compound pairConfidence: theoretical | Additive sedation possible.Source pending | Use lower doses when combined. |
Frequently asked questions about Ashwagandha
Ashwagandha is a supplement. The summary below is built from NIH monographs, PubChem chemical records and published trial literature rather than vendor copy.
Ashwagandha is commonly discussed in the context of supporting brain, sleep, menopause, and mens-longevity. Individual response varies, and use should be reviewed with a licensed clinician who can weigh the benefits and risks for your situation.
For Ashwagandha, it is typically taken evening. Always follow the specific dose your clinician or the product label prescribes.
Ashwagandha carries potential side effects and drug interactions, documented in NIH, Mayo Clinic, and FDA label sources. Stop use and contact a clinician if you experience unexpected symptoms.
Interaction risk for Ashwagandha comes from the rest of the stack: other supplements, prescription medicines, hormone therapy and peptides. Because Ashwagandha is usually taken evening, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Ashwagandha with no sign-up.
There is no single answer for Ashwagandha plus TRT. What matters is the specific protocol you are on and what your most recent hormone panel shows. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
Pairing Ashwagandha with peptides has to be assessed one peptide at a time, because GLP-1 agonists, secretagogues, healing peptides and melanocortins do not share an interaction profile. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Ashwagandha varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken evening. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Ashwagandha depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Ashwagandha the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
Which studies looked at Ashwagandha?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.Does Ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials(opens PubMed in a new tab)Phytother Res · 2022 · PMID 36017529 · https://pubmed.ncbi.nlm.nih.gov/36017529/
- 2.Can Ashwagandha Benefit the Endocrine System?-A Review(opens PubMed in a new tab)Int J Mol Sci · 2023 · PMID 38003702 · https://pubmed.ncbi.nlm.nih.gov/38003702/
- 3.Pharmacological evaluation of Ashwagandha highlighting its healthcare claims, safety, and toxicity aspects(opens PubMed in a new tab)J Diet Suppl · 2021 · PMID 32242751 · https://pubmed.ncbi.nlm.nih.gov/32242751/
- 4.Effects of Withania somnifera (Ashwagandha) on Stress and the Stress- Related Neuropsychiatric Disorders Anxiety, Depression, and Insomnia(opens PubMed in a new tab)Curr Neuropharmacol · 2021 · PMID 34254920 · https://pubmed.ncbi.nlm.nih.gov/34254920/
Verify at
Publisher search links for Ashwagandha. These are places to check the information — they are not citations, so they are not numbered.
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- Examine.com(publisher search, opens in a new tab)Examine.com · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- MedlinePlus(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- PubChem(publisher search, opens in a new tab)National Center for Biotechnology Information · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Ashwagandha?
Plain-text summary, safe to quote verbatim:
Ashwagandha (scientific name: Withania somnifera) is an ancient medicinal herb known for its adaptogenic properties. It is commonly used in Ayurvedic medicine, a traditional system of medicine from India. Research on Ashwagandha focuses on cognition and mood, sleep quality, and menopause symptoms.
Source: DoseRoutine — https://doseroutine.com/library/ashwagandha
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Ashwagandha — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/ashwagandha
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