Ashwagandha for Stress and Anxiety: Evidence & Safety

Ashwagandha has moved from Ayurvedic tradition to supplement shelves and social media feeds, usually with promises of calm, balance and resilience. Before you decide whether it deserves a place in your life, it helps to separate three things: what tradition says, what early research suggests, and what is actually approved in Australia. This article covers each in turn, along with the safety warnings that many overseas articles leave out.

This article is general education, not medical advice. Please speak to your doctor or pharmacist about your own situation.

What Is Ashwagandha?

Ashwagandha (Withania somnifera) is a plant used in traditional Indian Ayurvedic medicine. In Australia it also appears under the name "withania" on some product labels, so it’s worth knowing both names.

Traditional Use: Thousands of Years of History

In Ayurveda, ashwagandha has been used for thousands of years as a Rasayana, a restorative or rejuvenating herb. It is also described as an "adaptogen", a term for substances traditionally believed to help the body adapt to stress. Practitioners have used it to support vitality, restore balance and build resilience against fatigue.

Traditional use is a record of how people have used a plant over generations. It is not the same as proof from modern clinical trials. It tells us the herb has a long cultural history, not that it is effective or safe for any particular person today.

Early Research: Promising, but Limited

Modern researchers have studied ashwagandha, and the findings so far are interesting. Systematic reviews and meta-analyses of double-blind, placebo-controlled trials report that standardised ashwagandha extract was linked to statistically significant reductions in:

Subjective stress scores, such as the Perceived Stress Scale
Clinician-rated anxiety scores (HAM-A)
Serum cortisol levels, in stressed adults over roughly 30 to 60 days

Cortisol is often called the "stress hormone", which is why it features so heavily in ashwagandha coverage.

The researchers themselves add important caveats:

Study sizes are small.
Results vary a lot between studies (researchers call this high heterogeneity).
Long-term effectiveness and safety beyond 12 weeks remain unproven.
Formulations differ. Products used in trials are not interchangeable with every product on the market.

So "early and emerging" is the honest description. The results are worth following, but they don’t settle the question.

Stress Is Not the Same as an Anxiety Disorder

Many popular articles blur this distinction. The research above mostly involves stressed adults in the general population. That is quite different from a diagnosed anxiety disorder, which is a medical condition that deserves proper assessment and care.

Ashwagandha is not a replacement for cognitive behavioural therapy (CBT) or for treatment prescribed by a doctor. If anxiety is affecting your sleep, work, relationships or daily functioning, the first step is a conversation with a GP, not a supplement.

Understanding Australian product listings

An AUST L listing does not mean the TGA assessed that product’s efficacy before sale; its sponsor must hold supporting evidence. Check the exact ARTG entry and label. Traditional use is not clinical proof.

The Safety Warnings Australians Should Know

The Therapeutic Goods Administration (TGA) has issued a safety advisory on medicines containing Withania somnifera. Its main points are below.

Rare liver injury

The TGA highlights a rare risk of liver injury linked to Withania somnifera products. Stop the product and seek medical attention promptly if you notice:

Yellowing of the skin or eyes (jaundice)
Dark urine
Unusual fatigue
Abdominal pain

Sudden gastrointestinal symptoms

The TGA has also noted reports of sudden, severe gastrointestinal effects, including nausea, acute vomiting and diarrhoea, after taking products containing Withania somnifera. These symptoms can easily be mistaken for food poisoning.

Stop the product and seek medical advice for sudden severe nausea, vomiting or diarrhoea. Avoid it if you have existing or previous liver problems.

Who should be especially careful

People in these groups should avoid Withania somnifera or speak to a registered doctor before considering it:

Anyone with existing or past liver disorders
People taking thyroid medication
People with autoimmune diseases
People who are pregnant or breastfeeding should avoid ashwagandha.

Practical Examples

These are hypothetical situations, not real case reports.

The stressful season. Someone going through a demanding few months at work reads that ashwagandha might reduce stress and wonders about trying it. A sensible step is to ask a pharmacist first. They can check it against any medicines the person takes and discuss whether it suits them. They can also point to non-supplement approaches to stress, such as sleep, movement and talking to someone.

The thyroid medication question. A person who takes thyroid medication sees ashwagandha marketed as a "natural calming herb". Because thyroid medication is one of the flagged precautions, this person should check with their doctor before going any further.

The "food poisoning" that wasn’t. Someone who recently started a supplement containing withania develops sudden vomiting and diarrhoea and assumes it was something they ate. Given the TGA’s warning, it’s worth telling a doctor or pharmacist about the supplement, and about any other symptoms, rather than quietly pushing through.

The persistent worry. Someone has felt anxious most days for months. Reaching for a herb is understandable, but ongoing anxiety deserves a proper assessment, and a GP can discuss options with them, including evidence-based therapies.

Frequently Asked Questions

Does ashwagandha actually work for stress?

Some early trials report lower stress scores and cortisol levels in stressed adults over about 30 to 60 days. But studies are small and varied, and long-term benefits and safety are unproven. The evidence is promising, not conclusive.

Can ashwagandha replace anxiety medication or therapy?

No. Evidence does not support replacing established anxiety treatment with ashwagandha. Never stop or change prescribed treatment without talking to your doctor.

Is ashwagandha safe?

For most people the risk appears low, but the TGA warns of a rare risk of liver injury and of sudden severe gastrointestinal symptoms. Some people should avoid it or get medical advice first, as listed above.

What symptoms should make me stop and seek help?

Stop the product and seek medical advice promptly for jaundice, dark urine, unusual fatigue, abdominal pain, or sudden severe nausea, vomiting or diarrhoea.

Who should I talk to before trying it?

Your GP or pharmacist. They know your health history and medicines, and can help you weigh up the risks.

Conclusion

Ashwagandha has a long traditional history, and early research on stress is intriguing. But the studies are small and short-term, and in Australia it is not an approved treatment for anxiety disorders. The TGA’s warnings about rare liver injury and sudden gastrointestinal symptoms are a reminder that "natural" doesn’t mean risk-free.

If stress or anxiety is weighing on you, a conversation with your doctor or pharmacist is the best place to start. They can help you choose approaches that are safe and appropriate for you.