What current federal health sources say

The National Center for Complementary and Integrative Health (NCCIH) says research on kratom is still in its early stages and that much remains unknown about short- and long-term effects, safety, and possible therapeutic uses. It also states that kratom has not been shown to be safe and effective for opioid withdrawal or any other medical use.

The U.S. Food and Drug Administration (FDA) warns consumers not to use kratom because of reported serious adverse events, including liver toxicity, seizures, and substance use disorder. FDA also says there are no legally marketed prescription or over-the-counter drug products containing kratom or its known alkaloids. These are federal health-agency positions, not a personalized medical assessment.

Reported kratom side effects

NCCIH lists nausea, constipation, dizziness, and drowsiness among reported effects. It also notes rarer but serious reports of seizures, high blood pressure, and liver problems. FDA additionally describes reported substance use disorder and neonatal withdrawal after exposure during pregnancy.

A report that an effect occurred does not establish how often it occurs, what amount caused it, or what will happen to another person. Product composition, other substances, health conditions, and reporting gaps can all affect the evidence. This page therefore does not rank effects as “safe,” provide gram or serving thresholds, recommend a strain, or suggest redosing.

Dependence and withdrawal are documented concerns

NCCIH says regular users may experience withdrawal symptoms after stopping. FDA describes reported substance use disorder involving patterns such as using more or longer than intended, cravings, continued use despite harm, tolerance, and physical dependence. Those patterns warrant discussion with a qualified clinician or an evidence-based substance-use treatment service.

Withdrawal timing and severity cannot be predicted from a general webpage. Do not use a fixed internet timeline to decide that symptoms are harmless or to self-manage a severe reaction.

Interactions and product variability limit simple conclusions

NCCIH reports that deaths and severe adverse effects have been linked to kratom used with other drugs, while noting that fatal overdoses from kratom alone appear extremely rare and that more interaction research is needed. FDA likewise says that kratom was usually used with other drugs in reported deaths and that its contribution was unclear.

That uncertainty is not evidence that a combination is safe. A clinician or pharmacist needs the complete list of prescriptions, over-the-counter medicines, supplements, alcohol, and other substances to assess individual risk.

FDA has also reported Salmonella and heavy-metal contamination in some kratom products. A laboratory report applies only to the identified sample, analytes, methods, and reporting limits. It does not prove that every contaminant was tested, that another batch matches, or that a product is safe to use.

Concentrated 7-OH products need separate attention

FDA distinguishes botanical kratom from products intentionally enhanced or concentrated with 7-hydroxymitragynine (7-OH) or related opioid substances. A product marketed with “7-OH” language, unusually concentrated alkaloid claims, or unclear labeling should not be treated as equivalent to ordinary leaf. Check the current FDA 7-OH information and the exact product label rather than relying on a category name.

When to get help

Call 911 for collapse, trouble breathing, a seizure, severe confusion, or another life-threatening emergency. In the United States, Poison Control offers free, confidential help at 1-800-222-1222 or through poison.org. Bring or photograph the package and ingredient label when it is safe to do so.

FDA accepts reports about serious product problems through its MedWatch program. Reporting a suspected event is not the same as proving that one ingredient caused it.

Sources and evidence limits

Sources reviewed November 8, 2026. Evidence and agency guidance can change. This article is general information, not medical advice, diagnosis, or a substitute for emergency care.