FDA Warns Consumers about "Man Up Now" Supplement

It's probably not the best idea to Man Up.

The Food and Drug Administration is warning consumers to stop using Man Up Now capsules immediately because they contain a variation of an active drug ingredient found in Viagra that can dangerously lower blood pressure.

Man Up Now is marketed as a dietary supplement for sexual enhancement. Since Man Up Now claims to be "herbal" and "all natural," the FDA worries consumers may mistakenly assume the product is harmless and poses no health risk.

The capsules contain sulfoaildenafil, a chemical similar to sildenafil, the active ingredient in Viagra. Sulfoaildenafil can interact with prescription drugs like nitrates and cause dangerously low blood pressure.

Man Up Now, distributed by Synergy Distribution LLC, is sold on Internet sites, online marketplaces, and possibly in retail outlets.

As far as the FDA knows, there haven't been any illnesses connected to Man Up Now, but any product that contains prescription-strength drugs can expose consumers to sickness or death.

CBSNews.com has contacted Synergy Distribution but the company has not yet commented.