OPMS Review (2026): Why the FDA Warned Against OPMS Black Liquid
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Safety notice: In 2024 the FDA issued a public "Do Not Use" warning for OPMS Black Liquid Kratom following an adverse-event report that involved at least one death, and the brand faces wrongful-death and injury lawsuits. This is a cautionary review. If you are considering OPMS Black Liquid, please read the FDA advisory first.
The Verdict
OPMS (Optimized Plant Mediated Solutions) is one of the oldest and most recognizable extract brands, an AKA-GMP participant and a pioneer of cold-water extraction since 2010, and to its credit it does not sell a concentrated 7-OH isolate line and publicly supported the FDA and DEA action against those products. But this is the most cautionary review on my site, for one serious reason: the FDA issued a "Do Not Use" warning for OPMS Black Liquid Kratom in 2024 after an adverse-event report involving a death, and the brand faces wrongful-death litigation. OPMS Black is also among the most potent extracts on any shelf. A brand can be established and still be one I steer people away from, and that's the case here. For anyone reading this to decide what to buy, plain lab-tested leaf from a GMP vendor is a far safer choice.
The Honest Context
OPMS is not a scam or a fly-by-night operation. It's a long-running brand, its extraction process is genuinely well known, it operates FDA-registered facilities, and it took the right public position against concentrated 7-OH isolates. Its Silver line is even just plain-leaf capsules. If the story ended there, this would be a middling extract review.
It doesn't end there. The FDA "Do Not Use" advisory on OPMS Black Liquid is a specific, official safety warning tied to a reported death, and there is active wrongful-death and injury litigation. Those are the most serious regulatory red flags of any brand I've reviewed. Whatever the eventual legal outcome, when a federal agency tells consumers not to use a company's signature product, I'm not going to wave people toward it.
What a Buyer Should Know
OPMS Black is an extremely concentrated extract, which means a much higher risk of tolerance, dependence, and adverse effects than plain leaf, and its liquid version carries the standing FDA warning above. Public per-batch COAs were also not easy to find. If you already use OPMS and it works for you, that's your call to make with full information. But if you're asking whether to start, my answer is to choose a GMP-certified, lab-transparent plain-leaf vendor instead.
Looking for a safe, lab-tested kratom vendor instead of a potent extract under an FDA warning? My #1 pick, Kraken Kratom, is AKA-GMP certified, publishes lab results, ships free on every order, and offers a 90-day money-back guarantee. It's the safer default.
See My #1 Pick, Kraken Kratom Compare My Full Vendor RankingFrequently Asked Questions
Is OPMS kratom safe?
OPMS is an established, GMP-listed brand, but the FDA issued a "Do Not Use" warning for OPMS Black Liquid Kratom in 2024 after an adverse event involving a death, and the brand faces wrongful-death lawsuits. Its extracts are also very potent. For safety, plain lab-tested leaf from a GMP vendor is a better choice.
Does OPMS sell 7-OH?
OPMS does not market a concentrated or semi-synthetic 7-OH isolate line, and it publicly supported the FDA and DEA action against those products. Its extracts contain naturally-occurring 7-OH, and OPMS Black is a very strong extract.
What is the difference between OPMS Gold, Silver, and Black?
Silver is plain-leaf capsules, Gold is a mid-strength extract (capsules and shots), and Black is the strongest extract line (capsules and liquid). OPMS Black Liquid is the product under the FDA's 2024 "Do Not Use" warning.