If you have Erectile Dysfunction and have decided to do something about it, you are probably wondering whether to buy Cialis Viagra or some other drug which has the same effect. The best way to choose is of course, to discuss the whole matter with your doctor first. He will probably be able to advise you on which pill is the best to take, considering your medical history, and considering his experience with other patients. If you have not talked to your doctor, here are some fast facts about both drugs. Both Generic Cialis and Viagra work by improving blood flow to the penis, which is what causes the sustained erection, but Cialis has been rumored to last nine times longer than Viagra. Cialis is also a cheaper option, and in terms of dosage, Cialis is consumed in 10 mg and 20 mg tablets as compared to Viagra's 50 mg dosage requirement, which may be increased to 100 mg or decreased to 25 mg depending on the requirement. Side effects are similar as well. Given the above facts, it may seem that it is a better option to buy Generic Viagra, but first consider all the differences. As said, for the best information, talk to your doctor to get an opinion before you buy Cialis Viagra or any other drug which purports to treat Erectile Dysfunction.