MKS Enterprise, LLC was warned for selling Dose Vital Royal Honey VIP Honey containing the undeclared pharmaceutical ingredient tadalafil (the active ingredient in prescription drug Cialis) through interstate commerce, violating Section 301(ll) of the Federal Food, Drug, and Cosmetic Act. Laboratory analysis confirmed the presence of this PDE-5 inhibitor, which poses serious health risks including dangerous blood pressure drops when combined with nitrates found in common prescription medications used by patients with diabetes, heart disease, and high blood pressure. The company's website and product labeling failed to disclose this active pharmaceutical ingredient, constituting a prohibited act under federal law that restricts adding FDA-approved drugs to food products distributed in interstate commerce.