The drug Filagra contains Sildenafil as its main ingredient. This medicine is recommended only by doctors as it is the best medicine for the treatment of impotence in men. Filagra tablets increase blood flow to the penis in men. This medicine makes the sex life of men enjoyable. Filagra tablets are taken 30 minutes or 1 hour before sexual intercourse. The effect of this dose is observed for 4 to 5 hours. Filagra tablets can be taken before or after meals.