Erectile dysfunction (ED) is the inability to get or maintain an erection to satisfy your partner during sexual intercourse. There is no specific cause for it. The causes of having a sexual dysfunction can be physical or psychological. There are many factors which contribute to ED such as stress, anger, depression, fatigue and your family problems. If you have difficulties, most of the time during sexual intercourse, then it can be considered a problem and it is one of the root causes of low-self confidence in men and it affects relationships with their wives or girlfriends.

But remember, it is not so big problem as it seems. Men with ED face problems because of lack of adequate information, ignorance or no partner support. Today, advances in science have made it possible to cure such type of sexual problem and it can be a thing in the past. There are three well known brands out in the market to remedy this problem namely: CIALIS, LEVITRA, and VIAGRA.

These well known drugs almost work in similar way. They increase the flow of blood into the penis so that when a man is sexually stimulated, he can get an erection. Although these drugs may have similar mechanism, but there are subtle difference on how fast and how long they work.

Cialis is an ideal choice for a man with ED in comparison of other drugs. It is the only ED tablet clinically proven to both work up to 36 hours and work in some men as fast as 30 minutes. Cialis improved erectile function in most men but Viagra is oldest and being well known worldwide.

Now-a-days internet pharmacy is a very good source for the prescribed medicine. If you want to buy cheap cialis complete with legal prescriptions online, the online pharmacy will help you.

Such drugs are not suitable for everyone since each male individual's body is unique. They may cause side effects like upset stomach, headache, feeling warm, back pain etc.
So, first we should take doctor suggestion before using them, if he suggest only then you should start to take them.