You can buy revatio online without prescription from warmthbin.com, where you can get upto 25% off on all products and you will also get free delivery all over the USA. This medicine is used to treat the male sexual function disorder that is known as erectile dysfunction or impotence in adult men. This medicine uses sildenafil as its active ingredient. Sildenafil works by relaxing and widening the blood vessels in the penile region resulting men to get an erection. This medicine is also used to treat the pulmonary hypertension. When this medicine is prescribed to treat the Erectile Dysfunction this medicine is only consumed by men once in at least 24 hours. But when this medicine is prescribed to treat the pulmonary hypertension then this medicine can be consumed by both males and females 3 times a day with an interval of time of 4 to 6 hours. This medicine is taken 30 to 60 minutes befor any sexual activity.