Viagra is the notion that is familiar mostly to every person all over the world. Generic Viagra is the same produce as Brand Viagra, because it has the similar chemical structure and features and aids males with the difficulty of erectile dysfunction and its highest from - impotence. This dysfunction means that a male has no ability to have good erection to carry out a sexual act or his erection is inferior. Psychological and physiological aspects usually provoke erectile dysfunction, but there may be some more causes. Due to the researches, 80 percent of persons, who applied Viagra, felt better and absolutely recovered. Viagra makes blood flux into genitalia and it becomes the cause of erection. But the main thing is that the erection won't appear independently, but only in the case of sexual excitement. As you can find, Viagra does not substitute natural processes, it only aids improve them. Moreover, Viagra makes oxytocin flow into brain. It is a hormone that is intensifies romantic feelings.

Viagra does not influence man's reproductive functions. There are also a lot of dealers on the internet who propose online Cialis.

Levitra is the safest remedy. Preparation Levitra is the newest produce, an innovation in the field of ED preparations. There are some cases when it isn't suggested to people to cure erectile disorder with the assistance of Cialis and Viagra. It can be people with cardio problems or diabetics. And the first factors that commonly call the progression of erectile disorder are cardio-vascular sicknesses, smoking, fatness and diabetes. Moreover, Levitra is an extraordinary efficient medication, its initial dosage is only one fifth of that of Viagra, and so it reduces the danger of side effects and their strength. That makes Levitra a medication for those people who have cardio-vascular illnesses and diabetes. One more point is that Levitra is much more efficient in terms than Viagra. A patient is ready to a sexual intercourse only in 12 hours after intake. With the help of the network you would have pharmacies online as well.

One of the most effective preparations in this sphere is Cialis. Generic Cialis is an analogue to a Brand Cialis by its chemical composition. It has the same result in cure of erectile dysfunction, when a male has weakened erection and the strongest form of this dysfunction - impotence. The blood flow to genitalia with the help of Cialis effect, it calls erection that may occur only in the case of sexual arousal, but not independently. This system implies that Cialis doesn't substitute natural process, but only makes them stronger. And we have to mention that Cialis doesn't affect on man's reproductive functions. The dissimilarity between Cialis and Viagra is in less quantity of minimal necessary active elements. The minimum essential dose using Viagra is 25 mg (but in lots of cases this dose rises to 50 mg) and the dose for Cialis is 20 mg. Such low dosage guarantees better protection of different side effects. One more advantage of Cialis is the prolonged time of effectiveness.

The term of the effect of Viagra is 4 hours, of Levitra is 12 hours and of Cialis is 36 hours. You are suggested to purchase different prescription medications on the web.