Bestherbs Coffee LLC is voluntarily recalling its coffee after an FDA laboratory analysis confirmed the presence of desmethyl carbodenafil, which is “structurally similar to sildenafil, the active ingredient in Viagra, an FDA-approved prescription drug for erectile dysfunction (ED)”, according to regulators. ... While the product is marketed as a male enhancement drink, the FDA says the combo of sildenafil with other prescription drugs could pose health risks for those with high blood pressure, high cholesterol or heart disease.