Tongkat ali side effects are not fully understood because human studies have generally been small and short-term. Some users report digestive discomfort, itching, headaches, anxiety, or difficulty sleeping, while rare reports have raised concerns about liver injury. Long-term safety, daily use, and interactions with medicines remain uncertain, so this supplement is not suitable for everyone.
Last updated: October 2026
What Is Tongkat Ali, and Why Does Safety Matter?
Tongkat ali, also known as Eurycoma longifolia Jack, is a Southeast Asian plant whose roots have a history of traditional use. Today, its extracts are sold in supplements marketed for men’s wellness, energy, exercise performance, libido, and testosterone support.
Interest in the herb does not mean that every advertised benefit has been established. The US Department of Defense’s Operation Supplement Safety notes that evidence for marketed benefits remains limited and that human safety is not fully understood. Read its overview of tongkat ali uses and safety for a summary of the evidence.
Safety depends on more than the plant name. Extract concentration, manufacturing quality, other ingredients, a person’s health, and medicines they take can all affect the risk. Products sold under the same common name may not have equivalent compositions, and research on one standardized extract cannot automatically establish the safety of every powder, capsule, or liquid product.
Tongkat Ali Side Effects Reported in Research
In short-term human studies, side effects have often been described as mild or uncommon. Reported complaints include digestive upset, abdominal discomfort, diarrhea, headache, itching, and skin reactions. Some product safety information also lists insomnia and anxiety as possible adverse reactions. The available research does not establish how frequently these effects occur across all products and users.
The US National Library of Medicine’s LiverTox monograph on tongkat ali explains that small studies of different preparations have generally reported few adverse effects, but long-term use and higher exposures have not been adequately assessed in humans.
There is also a more serious, although uncertain, concern: possible liver injury. A published case report described a person who developed signs of acute liver injury after starting a supplement containing tongkat ali. A single case cannot prove that the herb was responsible, particularly when supplement ingredients and other contributing factors may be uncertain. However, the report is a reason not to dismiss new symptoms or assume that a botanical product is harmless.
Seek urgent medical care if you develop yellowing of the skin or eyes, dark urine, severe or persistent abdominal pain, or repeated vomiting after taking a supplement. Stop taking the product and tell the healthcare professional exactly what you used. Do not restart it unless a qualified professional advises you to do so.
Is Tongkat Ali Safe to Take Every Day?
There is not enough evidence to say that daily tongkat ali use is safe for everyone, particularly over extended periods. Some controlled human research has examined specific preparations over relatively short periods. For example, a randomized study of a standardized water extract combined with multivitamins followed participants for a 12-week period and reported no significant changes in vital signs or a metabolic blood panel; the study’s findings apply to the tested preparation and study conditions, not to every tongkat ali product (PubMed study record).
Short-term findings cannot answer every question about long-term exposure, uncommon reactions, or people with existing medical conditions. The European Food Safety Authority (EFSA) separately assessed a particular standardized root extract and concluded that its safety had not been established under the proposed conditions of use. The assessment raised concern about findings related to potential DNA damage in laboratory and animal testing (EFSA scientific opinion, published in the EFSA Journal).
This EFSA conclusion concerns the specific extract and evidence evaluated; it does not establish that every traditional preparation has identical properties. It does, however, show why reassuring short-term human findings should not be interpreted as proof of long-term safety.
If you are considering daily use, discuss the exact product and its label with a healthcare professional rather than relying on a general online dosage recommendation.
Does Tongkat Ali Affect Blood Pressure?
The effect of tongkat ali on blood pressure is not sufficiently established for it to be used as a way to manage blood pressure or to assume that it is neutral for everyone. Research on a particular extract may include vital-sign monitoring, but that does not rule out effects in people with hypertension, cardiovascular disease, or those taking blood-pressure medicines.
If you have high blood pressure, heart disease, an abnormal heart rhythm, or a history of cardiovascular problems, ask your healthcare professional before using tongkat ali. The same caution applies if you take prescription medication for blood pressure or heart function. Do not change or stop a prescribed medicine to accommodate a supplement.
If you notice unusual dizziness, faintness, palpitations, or other new cardiovascular symptoms after taking a product, stop using it and seek medical advice. Severe chest pain, difficulty breathing, or fainting requires emergency care.
Can Tongkat Ali Cause Insomnia or Anxiety?
Insomnia and anxiety are listed as possible adverse reactions in some tongkat ali product information. However, robust evidence is lacking to estimate how often they occur or to determine whether the effects are caused by the herb itself, the dose, other ingredients, or individual sensitivity.
If you already experience sleep difficulties, frequent anxiety, or sensitivity to stimulating supplements, be cautious. Avoid combining tongkat ali with other products marketed for energy, workout stimulation, or testosterone support without professional guidance, especially when the full ingredient list is unclear.
If sleep disruption, restlessness, headaches, or anxiety begins after you start using a product, stop taking it and assess the symptoms with a healthcare professional if they persist or are severe. Do not increase the amount in an attempt to overcome a perceived lack of effect.
Should You Cycle Tongkat Ali?
Some supplement routines recommend taking tongkat ali for a period and then taking a break. However, there is no well-established, evidence-based cycling schedule that has been shown to make long-term use safe. Taking breaks cannot be assumed to remove risks related to product quality, an underlying health condition, an interaction, or a possible adverse reaction.
Rather than following a cycling plan from social media, first consider whether you have a clear reason to use the supplement and whether a healthcare professional considers it appropriate. If you experience an adverse reaction, do not simply stop for a few days and restart to see what happens.
Does Tongkat Ali Interact With Medication?
Reliable human data on specific tongkat ali–drug interactions are limited. This lack of information is not proof that interactions cannot occur. Herbal supplements may alter the effects of medicines, and combination products can introduce additional ingredients that change the risk. The US National Center for Complementary and Integrative Health recommends discussing supplements with healthcare providers to help identify possible interactions (NCCIH guidance on discussing supplement use).
Get medical or pharmacist advice before using tongkat ali if you take prescription or over-the-counter medicines, especially if you use medicines for cardiovascular conditions, blood clotting, diabetes, mood, or hormone-related concerns. This is a precaution based on incomplete interaction evidence, not a claim that every medicine in these categories has a proven interaction with tongkat ali.
Bring the supplement label or a photo of the full ingredients list to your appointment. Include other herbs, vitamins, workout products, and sexual-wellness supplements you use. Do not stop prescribed medication or change its dose without guidance from the professional who manages it.
Tongkat Ali Safety at a Glance
| Question or concern | What the evidence suggests | Practical step |
|---|---|---|
| Digestive discomfort, headache, itching | Reported in safety information and human use; frequency is uncertain. | Stop use if symptoms develop and seek advice if they persist or worsen. |
| Liver health | Rare reports of possible liver injury exist; causation is not certain. | Avoid self-directed use if you have liver disease and seek care for warning signs. |
| Daily use | Long-term human safety data are inadequate. | Do not assume that daily use is safe indefinitely. |
| Blood pressure and heart conditions | Effects are not sufficiently established for individual medical situations. | Consult a healthcare professional if you have cardiovascular conditions or take related medicines. |
| Sleep and anxiety | Insomnia and anxiety are listed as possible reactions, but the rate is unknown. | Stop use and seek advice if these symptoms appear or worsen. |
| Medication interactions | Specific interaction evidence is limited. | Have a pharmacist or healthcare professional review the full ingredient list. |
| Extract quality | Products may vary in composition, concentration, and purity. | Choose products with clear labeling and credible quality documentation. |
How to Choose and Use Tongkat Ali More Carefully
If you and your healthcare professional decide that a tongkat ali product is appropriate, use a careful selection process. No supplement can be considered risk-free, and a more concentrated extract is not automatically a better choice.
Check the plant identity and product format
Look for the botanical name Eurycoma longifolia and clear information about the plant part and extract. Do not assume that root powder and a concentrated root extract are interchangeable. A capsule, liquid, and powder may differ in strength, composition, and serving instructions.
Oriental Heritage Herbalists offers several formats, including Eurycoma longifolia capsules, a liquid extract, and powder extract. Review the information for the specific product you are considering, and contact the supplier if you need clarification about its ingredients or intended use.
Review quality information
Prefer products with transparent ingredient labeling, batch identification, and accessible quality documentation. Where available, independent testing can help assess identity, contaminants, and whether a product meets its stated specifications. A label that says “standardized” or “premium” by itself does not establish clinical safety.
Quality matters because supplements marketed for sexual performance and athletic use have sometimes been found to contain undeclared pharmaceutical ingredients or contaminants. Operation Supplement Safety discusses these concerns in its tongkat ali safety overview.
Follow the product label and avoid stacking supplements
Follow the directions for the specific product and do not exceed the labeled serving. There is no single dosage that can be recommended for all extracts, because preparations and concentrations differ and a universally accepted safe long-term amount has not been established. Avoid combining several tongkat ali products or adding other hormone- or performance-focused supplements without professional advice.
For broader guidance on reading labels and using botanical products responsibly, see How to Use Herbal Products Safely and Effectively.
Who Should Avoid Tongkat Ali or Seek Medical Advice First?
Because the evidence is limited, extra caution is warranted for people with existing medical conditions. Speak with a healthcare professional before using tongkat ali if you have heart or blood-pressure problems, liver or kidney disease, a hormone-sensitive condition, or a history of significant anxiety or sleep problems. People who take medication should also obtain professional advice before starting it.
People who are pregnant or breastfeeding should not assume tongkat ali is safe, because adequate safety information is lacking. Speak with a healthcare professional if you are pregnant, breastfeeding, taking medication, or have a hormone-sensitive condition before using this or any other herbal supplement.
Do not use tongkat ali as a substitute for a medical evaluation if you have persistent fatigue, reduced libido, erectile difficulties, or concerns about testosterone. These symptoms can have several causes, and a clinician can help determine whether further assessment is appropriate. For a balanced discussion of the research, read Eurycoma Longifolia and Testosterone: What the Science Really Says.
Frequently Asked Questions
Are tongkat ali side effects common?
Available short-term studies often report few or mild adverse effects, but the true frequency is uncertain. Digestive symptoms, headaches, itching, anxiety, and insomnia have been reported or listed in product safety information. Limited research cannot rule out uncommon or long-term harms.
Can tongkat ali damage the liver?
There are published reports of possible liver injury associated with products containing tongkat ali, but the evidence does not establish how often this occurs or prove that the herb was responsible in every case. Seek medical care for jaundice, dark urine, or severe abdominal symptoms after supplement use.
Can I take tongkat ali with testosterone or other hormone-related products?
Do not combine tongkat ali with hormone-related medicines or other products marketed for testosterone support without professional guidance. The evidence on interactions and combined use is limited, and the ingredients in multi-product routines can vary.
Is tongkat ali safe for people with kidney or heart conditions?
Safety cannot be assumed for people with kidney or heart conditions because these groups may not be adequately represented in the available research. Ask your healthcare professional to review the specific product and your medical history before use.
What should I do if I experience side effects?
Stop taking the product and seek medical advice, particularly if symptoms are persistent, severe, or unusual. For possible liver injury, such as yellowing of the eyes or skin or dark urine, obtain urgent medical assessment. Keep the packaging so the healthcare professional can review the ingredients and product details.
The Takeaway
Tongkat ali is a traditional Southeast Asian botanical, but its long-term safety is not fully established. Human studies have generally been short, and possible side effects, liver concerns, product variability, and uncertain medication interactions deserve careful consideration. Daily use or cycling cannot be assumed to make it safe for everyone.
If you are exploring Eurycoma longifolia products, review the specific ingredient and quality information for the capsules, liquid extract, or powder extract. Choose based on transparent product information, and speak with a qualified healthcare professional before use if you have a medical condition or take medication.
