Cenforce FM 100 mg works by relaxing the smooth muscles in the walls of the blood vessels in the p*nis. Its action is localized and increases blood flow to certain areas. Thus, in response to s*xual stimulation, this medication increases blood flow to the p*nis, allowing for or improving a satisfactory erection. It is ineffective in the absence of s*xual stimulation. Used in the treatment of pulmonary arterial hypertension, this medication lowers blood pressure in the pulmonary vessels. In cases of erectile dysfunction, it is recommended to take this medication 30 to 60 minutes before s*xual activity, but no more than 4 hours beforehand. It is important to note that, for erectile dysfunction, this medication is ineffective without s*xual stimulation.