FDA warns ZUBB weight-loss supplement contains hidden sildenafil
Agency testing found the erectile dysfunction drug in the product, and FDA warns it can interact with nitrates such as nitroglycerin to drop blood pressure.
Key takeaways
- An FDA health fraud notice dated Sept. 4, 2026, tells consumers not to buy or use ZUBB Dietary Supplement.
- FDA laboratory analysis found sildenafil, the active ingredient in the prescription drug Viagra, in the product, and the label does not list it.
- FDA says sildenafil can interact with nitrates such as nitroglycerin and may push blood pressure down to dangerous levels.
- The product was sold for weight loss on various websites and possibly in some retail stores, and FDA found it while examining international mail shipments.
- For crews: the product name to check for is ZUBB Dietary Supplement; the notice lists no lot numbers, manufacturer or distributor.
The U.S. Food and Drug Administration issued a health fraud notification dated Sept. 4, 2026, warning consumers not to buy or use ZUBB Dietary Supplement. The agency said its own laboratory testing found an undisclosed prescription drug ingredient in the product, which is sold for weight loss [1].
According to the notice, the product was promoted and sold on various websites and possibly in some retail stores. FDA said it identified ZUBB while examining international mail shipments [1].
FDA laboratory analysis confirmed that the product "contains sildenafil not listed on the product label," the agency wrote [1]. The notice does not name a manufacturer or distributor, and it does not describe a company recall.
What the records show
The FDA notice gives the following details [1]:
- Product: ZUBB Dietary Supplement, marketed for weight loss.
- Hidden ingredient: sildenafil. The agency identifies it as the active ingredient in Viagra, an FDA-approved prescription drug used to treat erectile dysfunction.
- How it was found: during an examination of international mail shipments, followed by FDA laboratory analysis.
- Where it was sold: various websites, and possibly some retail stores.
FDA said sildenafil can interact with nitrates that are present in some prescription drugs, naming nitroglycerin as an example. According to the agency, that combination "may lower blood pressure to dangerous levels" [1].
The notice singles out people with diabetes, high blood pressure, high cholesterol or heart disease. FDA said these groups commonly take medications that contain nitrates, which makes the interaction a particular concern for them [1].
The agency asks health care professionals and consumers to report adverse events or side effects tied to the product through its MedWatch program. Reports can be filed with the online voluntary reporting form or by downloading the form and faxing it to 1-800-FDA-0178 [1].
Why it matters for EMS
The interaction FDA describes involves nitroglycerin, which the notice names directly. It also involves patients with cardiac and metabolic conditions, the groups the agency flagged as likely to be on nitrate drugs [1].
The product is sold as a weight-loss supplement, not as a sexual enhancement or erectile dysfunction product, and its label does not list sildenafil, according to FDA [1]. A person taking it may not know they are taking sildenafil. When asked about medications, that person may report only a dietary supplement, or nothing at all.
The notice offers no clinical guidance for responders. EMS clinicians work under local protocols and medical direction. The record does list MedWatch as the channel where health care professionals can report suspected reactions [1].
Context
FDA describes these notifications as a way to tell the public about products marketed as dietary supplements or conventional foods that contain hidden ingredients. The agency says such products are typically promoted for sexual enhancement, weight loss, pain relief and body building, and are often presented as all natural [1]. FDA also states that it cannot test and identify every supplement product that may contain harmful hidden ingredients [1].
FDA's separate list of recalls, market withdrawals and safety alerts includes a related entry. Tonight We Ride, LLC is shown recalling Ultimate Forza Male Supplement because it contains undeclared sildenafil, tadalafil and dapoxetine [4]. That entry shows no date in the version of the list reviewed. FDA notes on the page that not all recalls get press releases or appear on the list [4].
What the records do not tell us
- The notice does not name who makes, imports or distributes ZUBB Dietary Supplement.
- It gives no lot numbers, package descriptions, expiration dates or unit counts.
- It does not say how much sildenafil FDA measured in the product.
- It does not report any illnesses, injuries or adverse events linked to the product.
- It does not name the websites or retail stores involved, and FDA describes the retail sales only as possible.
- The records do not show a recall by any company, and no company statement appears in them.
- The notice does not say whether the product is still on sale.
Questions readers ask
What is in ZUBB Dietary Supplement?
FDA laboratory analysis found sildenafil in ZUBB Dietary Supplement, and the product label does not list it. Sildenafil is the active ingredient in the prescription drug Viagra.
Why is hidden sildenafil in a supplement dangerous?
FDA says sildenafil can interact with nitrates found in some prescription drugs, such as nitroglycerin, and may lower blood pressure to dangerous levels. The agency named people with diabetes, high blood pressure, high cholesterol or heart disease as a particular concern because they commonly take nitrate drugs.
Has ZUBB Dietary Supplement been recalled?
The FDA notice dated Sept. 4, 2026, is a health fraud notification telling consumers not to buy or use the product. The records do not describe a company recall and do not name a manufacturer.
How do I report a reaction to ZUBB Dietary Supplement?
FDA asks health care professionals and consumers to report adverse events through MedWatch, either with the online voluntary reporting form or by faxing the downloadable form to 1-800-FDA-0178.
Sources
- FDA: ZUBB Dietary Supplement may be harmful due to hidden ingredient (Sept. 4, 2026) — fda.gov (2026-10-27). fda.gov/drugs/medication-health-fraud-notifications/zubb-dietary-suppl
- FDA: Recalls, Market Withdrawals, & Safety Alerts — fda.gov. fda.gov/safety/recalls-market-withdrawals-safety-alerts
This is news, not medical advice. EMS clinicians: follow your local protocols and medical direction.
