Why is the active ingredient in Malegra FXT Plus called sildenafil? Home › Forums › Male Health › Why is the active ingredient in Malegra FXT Plus called sildenafil? Tagged: Malegra FXT Plus dosage, Malegra FXT Plus effectiveness This topic has 0 replies, 1 voice, and was last updated 2 years, 4 months ago by darrisasd. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In