An inhibitor of PDE is fildena 100. It functions by relaxing the muscles in the penile blood arteries, which increases blood flow to the penis. Follow your doctor's instructions on the dosage and duration of this medication. Take it all in at once. Never shatter, eat, or crush it. Take the Fildena with meals. Fildena 100 side effects are Flushing, headache, diarrhea, dyspepsia, and discomfort...