( CNN ) -- The makers of an over-the-counter male sexual supplement are recalling the product after government tests showed some unlisted ingredients `` pose a threat to consumers , '' the company says . Tests conducted by the Food and Drug Administration found that the supplement X-Rock contained sildenafil -- an approved drug to treat erectile dysfunction -- and related substance , hydroxythiohomosildenafil , the product 's manufacturer said in a statement annoucing the voluntary recall . The announcement from the product 's manufacturer , X-Rock Industries , was posted on the FDA 's website . `` These undeclared active ingredients pose a threat to consumers because sildenafil and hydroxythiohomosildenafil may interact with nitrates found in some prescription drugs ( such as nitroglycerin ) and lower blood pressure to dangerous levels , '' X-Rock Industries said . Erectile dysfunction is more common in men with diabetes , high blood pressure , high cholesterol and heart disease , who are generally more likely to take nitrates , the statement noted . But the company `` has not received any reports of adverse events related to this recall , '' it said . The voluntary recall `` is being conducted with the knowledge of the U.S. Food and Drug Administration , '' X-Rock said . The product 's website , XRockme.com , describes the U.S.-manufactured supplement as `` totally organic . '' It contains `` many potent , proprietary natural ingredients -- absolutely no chemicals or steroids , '' the website states . In addition to Internet sales , the company says X-Rock is sold at retail locations in Nevada , California , Florida , New York , New Jersey , South Carolina `` and a few more states . '' People can return the product to where it was purchased or call 877-976-2563 between 9 a.m. to 9 p.m . ET Monday through Saturday for more information on getting a refund , the company said in its release .
`` Undeclared active ingredients '' in X-Rock for Men `` pose a threat , '' the company says . The FDA has not yet approved any over-the-counter products containing undeclared ingredients. The product is billed as an `` organic '' supplement with `` no chemicals or steroids ''