If you’ve wondered whether a nutritional supplement could resolve an issue that ails you, talk with your doctor—experience tells us the right one is at least worth a try. Just note that today, the FDA announced a nationwide recall on a supplement aimed at easing a seldom-discussed, but very common, issue: bladder problems. With the American Urological Association stating that around 33 million Americans have overactive bladders and another near-30 million experience urinary incontinence, getting a doctor’s thoughts on cranberry or another supplement can lead to relief.

For some of these folks, on Tuesday, the U.S. Food and Drug Administration (FDA) has flagged an over-the-counter pill that consumers may have purchased it from two of the country’s largest retailers.

In an October 28 alert, the FDA says that one lot of MyBladder dietary supplement bottles, produced by Plainview, NY-based Purity Products, has been recalled across the U.S. because the lot “has the potential to be contaminated with Escherichia coli O7:K1 and 1303.” The announcement does not specify how many total bottles are affected, but says the MyBladder supplements were distributed “through direct delivery to consumers, through the Walmart and Amazon websites.”

Consumers are instructed to identify the recalled product with the following details:

• Lot number: 03042517
• Bottle size: 150 CC
• Contains 60 clear capsules containing brown powder
• Product reportedly comes in a white HDPE bottle with a white cap

Both strains of the mentioned E. coli bacteria “may pose a risk for gastrointestinal or other infections,” warns the FDA, going on to say that babies, young children, older adults, and immunocompromised individuals are particularly at risk of these infections. As explained by the Cleveland Clinic, common symptoms of an E. coli infection include diarrhea, stomach pains and cramps, low fever, and loss of appetite.

The FDA published an image of the product label claiming the supplements support “normal bladder tone & control.”

Routine testing reportedly first surfaced the contamination concern, and additional testing “indicates the problem was caused by a temporary change in suppliers,” per the FDA’s alert, adding that the recall “is being conducted as a precaution to protect all consumers and uphold product safety.”

Consumers are urged to immediately stop using any product with the affected lot number. The FDA says the recalled product can be returned to the original place of purchase for a full refund—though consumers can also just discard it. Additionally, the agency suggests contacting a doctor or healthcare provider “if you experience unexpected side effects after using this product.”

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