Can You Have Withdrawal From Ashwagandha?

Withdrawal-like symptoms after stopping ashwagandha have been documented in medical literature, though the evidence so far consists of case reports rather than large clinical trials. The most detailed published case describes a 20-year-old man who developed a racing heart, insomnia, and anxiety shortly after abruptly stopping a daily 600 mg ashwagandha extract. The biological explanation centers on ashwagandha’s ability to activate the same brain receptors targeted by drugs well known for causing withdrawal, particularly GABA receptors. While many people stop taking ashwagandha without incident, the possibility of rebound symptoms is real enough that clinicians have begun publishing warnings about it.

What Symptoms Have Been Reported

The clearest case in the medical literature involves a young man who had been taking 600 mg of ashwagandha extract daily and stopped suddenly. Within a short time he experienced tachycardia (a noticeably fast heartbeat), insomnia, and worsening anxiety. No other medical conditions or life stressors explained the onset, and the timing lined up closely with cessation of the supplement.¹ The authors of that case report noted that the pattern resembles what happens when people abruptly stop other substances that work through the GABA system, such as benzodiazepines or alcohol, though ashwagandha’s effects are far milder by comparison.

Anecdotally, people in online supplement communities describe a broader set of complaints after quitting: disrupted sleep, heightened irritability, a vague sense of unease, and sometimes a return of the very stress or anxiety symptoms that led them to try ashwagandha in the first place. The challenge is distinguishing genuine withdrawal from rebound, which is the return of an underlying condition that the supplement was masking. In the published case, the authors acknowledged this ambiguity directly, writing that “alternative explanations, such as recurrence of underlying anxiety, are possible” but that the severity and timing pointed toward a withdrawal phenomenon.¹

Why Ashwagandha Can Act on GABA Receptors

The most compelling biological explanation for withdrawal involves GABA, the brain’s primary calming neurotransmitter. When researchers tested an aqueous extract of ashwagandha root on GABA receptors, they found it directly activated both GABAA and GABAρ1 receptor types. The GABAρ1 receptors were roughly 27 times more sensitive to the extract than GABAA receptors, and the extract produced maximum currents at GABAρ1 receptors that were statistically indistinguishable from those produced by GABA itself.²

Here is why that matters for withdrawal. When you regularly flood GABA receptors with an outside agonist, the brain can adjust by reducing its own GABA production or by making the receptors less responsive. If you then remove the external source abruptly, the system is temporarily under-braked. The result can be a hyperexcitable state: racing thoughts, anxiety, trouble sleeping, a fast heartbeat. This is the same general mechanism behind benzodiazepine withdrawal, though the degree of receptor binding with ashwagandha appears much weaker.

An interesting detail from the receptor study is that the two best-known active compounds in ashwagandha, withaferin A and withanolide A, did not activate GABA receptors at all. Whatever is triggering the GABAergic activity is some other, not-yet-identified component of the whole extract.² This means that different ashwagandha products, depending on how they are extracted and which plant parts they use, could vary enormously in their GABA-related potency and therefore in their withdrawal potential.

The Stress Hormone System Gets Involved Too

GABA is only part of the story. Ashwagandha is classified as an adaptogen, a category of substances thought to help the body manage stress. Research on adaptogens broadly has linked their protective effects to the hypothalamic-pituitary-adrenal (HPA) axis, the hormonal cascade that controls your cortisol output and stress response.³ Many of ashwagandha’s clinical trials report reduced cortisol levels in participants, which is exactly the selling point for people using it for stress relief.

But suppressing cortisol for extended periods has consequences. In a striking case, a patient who took 950 mg of ashwagandha daily for a full year developed features resembling Cushing’s syndrome (weight gain, facial puffiness, and other signs of cortisol excess, paradoxically from a disrupted feedback loop) along with pronounced suppression of the HPA axis. The most alarming part: adrenal insufficiency persisted even six months after the patient stopped taking the supplement. The reporting clinicians described this as a “cumulative, dose- and duration-dependent effect” on adrenal function.⁴

This is a different mechanism from classical GABA withdrawal, but it can produce overlapping symptoms. When your adrenal glands have been suppressed for months and you suddenly remove the substance doing the suppressing, the glands may not immediately bounce back. Fatigue, low blood pressure, dizziness, nausea, and weakness can follow, sometimes for weeks or months. In clinical medicine, this is known as adrenal insufficiency, and it is the same risk doctors manage when tapering patients off long-term corticosteroid drugs.

Thyroid Changes After Stopping

Ashwagandha has documented effects on thyroid hormones, and these can create their own kind of post-cessation turbulence. A 73-year-old woman who had been self-treating her hypothyroidism with ashwagandha root extract for two years developed supraventricular tachycardia (an abnormally fast heart rhythm originating above the ventricles) along with symptoms of hyperthyroidism and very low TSH levels. After she stopped the supplement, her symptoms resolved and her thyroid levels improved.⁵

This case illustrates that “withdrawal” is not the only post-cessation issue. If ashwagandha has been propping up your thyroid output, stopping it could lead to a period where thyroid hormone levels drop before your body recalibrates. For someone with pre-existing thyroid disease, this swing could feel quite dramatic: fatigue, weight changes, mood shifts, cold intolerance. The lesson is that ashwagandha can alter endocrine systems in ways that take time to correct themselves once the supplement is removed, even if the eventual outcome is a return to normal.

Dose and Duration Make a Difference

Most randomized trials of ashwagandha use doses in the range of 300-600 mg per day and run for 8 to 12 weeks. At those levels and durations, published adverse-event profiles are generally mild. The problems documented in case reports tend to involve higher doses, longer durations, or both. The HPA axis suppression case involved 950 mg daily for a year, well above what trials have studied.⁴ The withdrawal case involved a more moderate dose of 600 mg daily, but the report did not specify how long the patient had been taking it before stopping.¹

A reasonable working assumption is that higher doses and longer use carry more risk. This aligns with what we know about other GABA-active substances: the stronger the signal your brain has adapted to and the longer that adaptation has been in place, the more noticeable the adjustment period will be when the signal is removed. If you have been taking ashwagandha for a few weeks at a standard dose, abrupt cessation is unlikely to produce dramatic symptoms. If you have been taking it daily for months or at higher-than-typical doses, more caution is warranted.

How to Reduce Your Risk

No formal tapering protocol for ashwagandha exists in clinical guidelines, because regulatory agencies have not evaluated it the way they would a prescription medication. But the pharmacological logic is straightforward, and it borrows from how physicians manage discontinuation of other substances that affect GABA or cortisol.

Taper gradually: Rather than stopping cold, reduce your dose by roughly a quarter every one to two weeks. If you are on 600 mg daily, step down to 450, then 300, then 150, then stop. There is no published evidence proving this specific schedule prevents withdrawal, but the principle of gradual dose reduction is well established for GABA-active compounds.
Watch for early signs: Increased anxiety, disrupted sleep, or a noticeably faster resting heart rate in the days after a dose reduction may signal that your body is adjusting. Slowing the taper can help.
Talk to your doctor first if you have been using it long-term: If you have taken ashwagandha daily for six months or more, your HPA axis may have adapted. A clinician can check cortisol levels and thyroid function to see whether a supervised taper is wise.
Avoid stacking cessations: If you are also discontinuing caffeine, sleep aids, or any other supplement that affects your nervous system, try not to stop everything at once. Layered withdrawals can amplify symptoms and make it hard to identify which substance is causing what.

Product Variability Complicates the Picture

One of the underappreciated factors in ashwagandha withdrawal risk is that not all ashwagandha products are biochemically equivalent. A comprehensive metabolic analysis of the plant identified 62 major and minor metabolites in leaf extracts and 48 in root extracts, with only 29 common to both tissues. The differences were especially pronounced among secondary metabolites, the category that includes the biologically active withanolides.⁶ Since the GABA-activating component of ashwagandha has not been pinpointed, two products labeled “ashwagandha extract” could have very different potencies at GABA receptors depending on whether they use root, leaf, or a blend, and on how the extraction was performed.

On top of natural variability, there is the problem of adulteration. Researchers have developed testing methods specifically to detect synthetic pharmaceutical drugs illegally spiked into ashwagandha products, including compounds used for erectile dysfunction. These adulterants are added by unscrupulous manufacturers to make the product seem more potent, particularly for aphrodisiac claims, and they pose serious health risks for older adults and people with chronic conditions.⁷ If your ashwagandha product contains undeclared pharmaceuticals, what you experience when stopping could be withdrawal from those drugs rather than from ashwagandha itself.

Choosing a product that has been independently tested by a third-party lab and that clearly states whether it uses root extract, leaf extract, or both can reduce some of this uncertainty. Standardized extracts like KSM-66 (root-only) or Sensoril (root and leaf) at least aim for batch-to-batch consistency, though even these are not perfectly uniform.

Rebound Versus Withdrawal Versus Return of Symptoms

Disentangling these three possibilities is genuinely difficult, and most people experiencing discomfort after stopping ashwagandha will not be able to do it on their own. A quick framework, though, can help you orient yourself.

True withdrawal is a set of new symptoms caused by the body’s adaptation to a substance being disrupted. The hallmark is symptoms you did not have before you started taking the supplement. If you never had heart palpitations before ashwagandha but develop them after stopping, that points toward withdrawal.

Return of symptoms is the re-emergence of whatever condition you were taking ashwagandha for. If you started ashwagandha because of generalized anxiety and the anxiety comes back at its previous level after you stop, the simplest explanation is that the supplement was suppressing it and now it is no longer being suppressed. This is not withdrawal; it is just the medication wearing off.

Rebound is a middle ground: the original symptoms come back but worse than they were before you started the supplement. Rebound anxiety, for instance, would mean your anxiety after quitting is more severe than it was before you ever tried ashwagandha. This can be caused by the same neuroadaptation processes that cause withdrawal, particularly receptor downregulation in the GABA system.

The published case report acknowledged this ambiguity explicitly, noting that the patient’s anxiety could have been a return of a pre-existing condition rather than a new withdrawal syndrome.¹ In practice, the distinction matters less for what you should do about it. Whether the cause is withdrawal, rebound, or return of symptoms, the management approach is similar: taper rather than stop abruptly, seek medical advice if symptoms are severe, and consider whether you need a different long-term strategy for whatever you were using ashwagandha to treat.

Liver Effects Add Another Layer

While not directly a withdrawal issue, ashwagandha-related liver injury is worth knowing about because it can complicate what happens when you stop the supplement, and because liver symptoms sometimes first become apparent around the time of cessation. A case series from Iceland and the US Drug-Induced Liver Injury Network described five patients who developed jaundice, nausea, fatigue, itching, and abdominal discomfort after taking ashwagandha for 2 to 12 weeks. The liver injury pattern was cholestatic or mixed, and symptoms, particularly itching and elevated bilirubin, lingered for 5 to 20 weeks. Liver tests normalized within 1 to 5 months in the four patients who were followed up.⁸

In a separate case, a patient who had been taking ashwagandha for a year was hospitalized with acute hepatitis and severe jaundice. Laboratory work revealed elevated liver enzymes, bilirubin, and other markers of liver damage, and the clinical condition required intensive treatment including plasmapheresis (a procedure that filters the blood).⁹ These cases are rare, but they underscore that someone stopping ashwagandha who feels unusually fatigued, nauseated, or notices yellowing of the skin should not assume it is just withdrawal. Liver injury can look similar in its early stages, and it requires medical evaluation.

Why the Evidence Is Still So Thin

If ashwagandha can activate GABA receptors and suppress cortisol, why is withdrawal not better studied? A few factors explain the gap. Most randomized trials of ashwagandha are short, lasting only a few months, and they rarely include a structured follow-up period after participants stop taking the supplement. Trial endpoints focus on whether the supplement works, not on what happens when you quit. Adverse event reporting in supplement trials is also notoriously uneven; mild post-cessation symptoms may not be recorded as noteworthy.

There is also a cultural framing issue. Ashwagandha has been used in Ayurvedic medicine for centuries, and its reputation as a gentle, natural remedy makes both researchers and consumers less likely to look for dependence or withdrawal. Herbal supplements occupy a regulatory gray zone in most countries: they do not undergo the same pre-market safety testing as prescription drugs, and post-market surveillance is limited. The result is that the pharmacological effects are real, but the safety data lags years behind the marketing. The case reports we have now are likely the tip of a larger iceberg of unreported experiences, simply because most people who feel a bit anxious or restless after stopping a supplement do not visit a doctor about it, let alone end up in a published case study.

For anyone currently taking ashwagandha and wondering whether they should worry, the honest assessment is this: the risk of clinically significant withdrawal appears low at standard doses used for a few months, but it is not zero, and we do not yet have the data to say exactly where the threshold lies. The GABA mechanism provides a plausible biological reason for caution, and the case reports confirm that at least some individuals do experience meaningful symptoms after stopping. A gradual taper costs nothing and eliminates most of the risk.

1
PubMed Central. Unmasking Potential Withdrawal Effects of Ashwagandha: A Case Report and Review
2
PubMed. Direct evidence for GABAergic activity of Withania somnifera on mammalian ionotropic GABAA and GABAρ receptors
3
PubMed Central. Effects of Adaptogens on the Central Nervous System and the Molecular Mechanisms Associated with Their Stress-Protective Activity
4
Endocrinología, Diabetes y Metabolismo Casos Clínicos. From herbal hope to hormonal havoc: chronic ashwagandha use and HPA axis suppression
5
PubMed Central. Ashwagandha as a Unique Cause of Thyrotoxicosis Presenting With Supraventricular Tachycardia
6
Elsevier / Phytochemistry. Comprehensive metabolic fingerprinting of Withania somnifera leaf and root extracts
7
Elsevier. A validated green UPLC method for the quantification of synthetic pharmaceutical adulterants in the extract of the aphrodisiac herbal plant ashwagandha (Withania somnifera) and in spiked human plasma
8
PubMed Central. Ashwagandha-induced liver injury: A case series from Iceland and the US Drug-Induced Liver Injury Network
9
PubMed Central. Liver Dangers of Herbal Products: A Case Report of Ashwagandha-Induced Liver Injury