CardiovascularBusiness -- The FDA notified Novacare that certain products appear to contain sulfoaildenafil, an analogue of Sildenafil, an FDA-approved drug for erectile dysfunction (ED). Sulfoaildenafil is not declared on the product labels, according to the agency, and the undeclared ingredient may interact with nitrates found in some prescription drugs such as nitroglycerin and may lower blood pressure to dangerous levels.
