Fildena 150 men can enjoy a strong erection using this drug. The drug sildenafil works by increasing blood flow to the penis. Strong erection can be achieved by using this drug about 30 minutes before sex. This medicine should be taken only once in 24 hours. This medicine should be used as per the advice of your doctor otherwise damage may occur to the body. This drug can be taken by people above 18 years of age.