malegra 100 tablets are used to treat men suffering from erectile dysfunction. Sildenafil citrate is the active ingredient in this medicine. Take this medicine only once a day. The effect of this drug lasts for 4 to 6 hours. And if the effect of this medicine lasts for more than 6 hours, seek the help of a doctor immediately. Consult a doctor before using this medicine. Do not use this medicine daily.