Mixing Kratom With Alcohol or Other Drugs: What Federal Death and Safety Reports Show

The most serious kratom outcomes in federal data involve other substances. What the CDC, FDA and NIH reports show, and what they cannot tell you.

Short answer: the federal record points one way. In the largest CDC review of kratom-positive overdose deaths, nearly all the people who died had other substances in their system, most often fentanyl or heroin. The FDA says kratom-associated deaths usually involved other drugs, and NIDA links severe adverse effects to polysubstance use. No federal agency has identified any combination of kratom with other drugs as safe.

This page sums up what those reports show. It is not a guide to combining anything. If you take any medication, talk to a pharmacist before using kratom at all.

What the CDC found in overdose deaths

The most-cited federal dataset is a 2019 CDC Morbidity and Mortality Weekly Report that looked at overdose deaths entered into the State Unintentional Drug Overdose Reporting System from July 2016 through December 2017 in 27 states.

• Of 27,338 overdose deaths, 152 decedents (0.56%) tested positive for kratom.
• A medical examiner or coroner listed kratom as a cause of death in 91 of those 152.
• Kratom was the only substance detected in seven. The CDC authors note that they could not rule out other substances even in those cases.
• Among kratom-positive decedents, fentanyl or fentanyl analogs were listed as a cause of death in 65.1%, heroin in 32.9%, benzodiazepines in 22.4%, prescription opioids in 19.7% and cocaine in 18.4%. These overlap, because many deaths involved several drugs.

Two cautions about reading those numbers. First, the data are from 2016 and 2017, before concentrated 7-OH products were widely sold. Second, a positive kratom test in a death involving fentanyl doesn't tell you how much kratom contributed. The data show where kratom turns up in deaths. They don't show what it did.

What the FDA and NIH say

FDA

The FDA's kratom page (updated December 2, 2025) says deaths have been associated with kratom, that kratom was usually used in combination with other drugs, and that kratom's own contribution is often unclear. The agency warns consumers not to use kratom at all. It also lists liver toxicity and seizures among reported serious adverse events, and says it has warned the public about kratom products contaminated with Salmonella or concerning levels of heavy metals.

NIDA

NIDA's kratom page (updated March 11, 2026) says fatal overdose from kratom alone is extremely rare. For a 2011 to 2017 comparison period, it cites more than 200,000 opioid-related overdose deaths against 11 deaths linked to kratom exposure, two of which involved kratom alone. It adds that polysubstance use involving kratom "has been associated with severe adverse effects." NIDA also notes a lab finding: 7-OH can cause respiratory depression that naloxone reverses.

NCCIH

The NIH's complementary-health center says the use of kratom in combination with other drugs "has been linked to deaths," and that more research is needed on drug interactions. Put plainly, nobody has mapped which medications interact with kratom and how badly.

Combination by combination: what the record shows

The hidden-ingredient problem

Some combinations aren't chosen at all. They come in the bottle. Products sold as "enhanced," "extra strength" or under names that never mention kratom have turned up with undeclared kratom alkaloids. In the May 2026 case, about 448 boxes of an elixir sold online between November 2025 and March 2026 were found to contain undeclared mitragynine and MP, according to reporting on the FDA alert.

That's why lot-matched lab reports matter. Our adulterated kratom guide explains what contamination and spiking look like on a certificate of analysis, and 7-OH vs natural leaf explains why concentrated products are a separate risk category. If a product won't tell you what's in it, assume the worst.

What these reports can't tell you

It's worth being clear about the limits, because both sides of the kratom debate overread this data.

• They can't give you a safe threshold. Death reviews record what was found, not how much of each substance would have been tolerated. The DEA's October 2026 notice makes the same point about 7-OH. It says no finding has been made that levels below its scheduling threshold are safe.
• They undercount products that never got tested. Toxicology screens look for what they're set up to find. Newer compounds like MP may not show up in older data at all.
• They don't separate product types. A kratom-positive result doesn't say whether the person used leaf powder, a concentrated extract or a 7-OH tablet.
• They say little about non-fatal harm. Seizures, liver injury and emergency visits from combinations are tracked less consistently than deaths.

The honest reading is narrow but firm. Kratom shows up most often in serious outcomes alongside other drugs, especially opioids, and nobody can tell you a combination is safe.

Before you combine anything: a checklist

1. List everything you take, including prescriptions, over-the-counter sleep or allergy aids, cannabis, alcohol and supplements.
2. Take that list to a pharmacist along with the kratom product's label and lab report.
3. Flag any opioid, benzodiazepine or medication for opioid use disorder. These are the classes where the federal record is clearest.
4. Skip products with no lot-matched COA and anything marketed on strength or as 7-OH. Our guide to spotting synthetic 7-OH shows the label clues.
5. Know the warning signs of a medical emergency: unresponsiveness, slow or stopped breathing, blue lips, seizures, confusion.

The FDA has not approved kratom for any use, there is no established safe dose, and anyone considering it should talk to a clinician first.

If something goes wrong

• Call 911 if someone is unresponsive, breathing slowly or not at all, or having a seizure. If naloxone is available and opioids may be involved, use it and still call 911.
• Poison Help: 1-800-222-1222. It's free and answered 24/7, and it connects you to your local poison center, which can advise on combinations and symptoms.
• Afterwards, report it. Our dependence and withdrawal guide lists help lines if regular use is part of the picture. A separate guide covers reporting a bad product to the FDA.

For background on why regulators describe kratom compounds as opioid-like, see Is kratom an opioid?

Sources

• CDC, MMWR, "Notes from the Field: Unintentional Drug Overdose Deaths with Kratom Detected, 27 States, July 2016 to December 2017," vol. 68, no. 14 (2019): cdc.gov
• FDA, "FDA and Kratom" (updated December 2, 2025): fda.gov
• NIDA, "Kratom" (updated March 11, 2026): nida.nih.gov
• NCCIH, "Kratom": nccih.nih.gov
• KTVU/FOX, report on the May 2026 FDA alert about Better Weather Fix Elixir products: ktvu.com
• Poison Help (HRSA): poisonhelp.hrsa.gov