Mary Bowerman

USA TODAY

A Texas company issued a voluntary recall after a substance similar to one used in Viagra was found in its coffee, according to a U.S. Food and Drug Administration notice.

Bestherbs Coffee LLC issued a recall of New of Kopi Jantan Tradisional Natural Herbs Coffee after FDA testing found the presence of desmethyl carbodenafil, according to the FDA.

"Desmethyl carbodenafil is structurally similar to sildenafil, the active ingredient in Viagra, an FDA-approved prescription drug for erectile dysfunction," the FDA said in a statement.

The product also contained undeclared milk, according to the FDA.

While the New of Kopi Jantan Tradisional Natural Herbs Coffee is marketed as a male enhancement product, the desmethyl carbodenafil could interact with nitrates in some prescription drugs and possibly lower blood pressure to dangerous levels, the FDA said in a statement.

The product was sold online and distributed to customers across the country. Bestherbs Coffee LLC said it will refund customers who return the product to Coffee LLC, 4250 Claremont Dr, Grand Prairie, Texas, 75052.