Which is Viagra (Sildenafil)? Viagra is used to treat impotence in men. Viagra increases body' capacity of s to reach and to maintain an erection during the sexual stimulus. There are only three oral drugs approved by the FDA to treat eréctil dysfunction: The work of Cialis, Levitra, and Viagra.All increasing the flow of blood in the penis so that when stimulates a sexual man, he can secure an erection, only the best dor prescripted than eréctil dysfunction is Viagra.Sildenafil is used to treat high the arterial tension in the lungs (pulmonary arterial hypertension) being blocked certain enzyme (phosphodiesterase-PDE5) in the body. Viagara asks online, the works relaxing the blood vessels in the lungs and the rest of the body. Sildenafil is also available in other forces to treat eréctil dysfunction in men, does not replace a form of this drug for the other. It requests viagra online and it uses this medication regularly to secure the majority of the advantage of her. Before you you request viagra online, say to its doctor, phamacist, our aid online of the use if you are allergic to him; or if you have any other allergies, because he can give the indirect effect combined with the other medicine.PAH), turned by the pharmaceutical company Pfizer.How does the work of Viagra? When the sexual stimulus and waking up happen, they do a chemical agent called cyclical GMP to be produced. The cyclical GMP creates erections doing the arteries of the penis to extend itself and the veins to narrow. That is to say, it creates " jam" of the traffic; of the blood in the penis with blood entering more quickly than it goes away. That' s what causes the penis to obtain hardly. The part of the physiological process of the erection implies the parasimpático nervous system that it causes the launching of nitric oxide (NOT) in the cavernosum of the compilation of the bows of penis.NO to the receivers of the cyclase of guanylate of the enzyme that gives rise to increasing cyclical monophosphate levels of the guanosina (cGMP), taking to the relaxation of the smooth muscle (vasodilatación) of the intimate shock absorbers of the arteries of helicine, giving by result the increasing affluence of the blood and an erection. Viagra for an enzyme that attacks the cyclical GMP, a GMP so cyclical can accumulate in man' penis of s. With present the cyclical one of the GMP it causes the extension normal of the arteries and to narrow of the veins that an erection produces. Viagra asks online, is a powerful and selective inhibitor of the specific type 5 (PDE5) of fosfodiesterasa of cGMP that is responsible for the degradation of cGMP in the cavernosum of the compilation. The molecular structure of the sildenafil is similar to the one of cGMP and acts like agent competitive astringent more of PDE5 in the cavernosum of the compilation, giving by result cGMP and better erections. Without the sexual stimulus, and therefore the deficiency of the activation of the system of NO/cGMP, viagra (sildenafil) does not have to cause an erection. Viagra is metabolizado by hepatic enzymes and excreted by the liver and the kidneys. If it is taken with a food of high degree in fats, it can have a retardation in the absorption of viagra and the maximum effect could be reduced slightly because the concentration of the plasma will be lowered. The dose of Viagra DosageThe de Viagra (sildenafil) is magnesium 25 to magnesium 100 taken not more in one go per day between 30 minutes and 4 hours before the sexual copula. It is recommended generally to begin with a dosage of lower magnesium 50 and then or to raise the dosage like appropriate. It online requests viagra, soldd in three dosages (25, magnesium 50, and 100), the calculation of cost three on US$10 by pill. sildenafil of Viagra of Name-marks of factory is not written down and a quite hard layer does more difficult to exactly cut pills by half, even with a cutter of the pill. How I recognize pills of Viagra? The pills of Viagra are blue and of form made shine like diamonds with " of the words; Pfizer" in one lateral one, and " VGR 25" , " VGR 50" , " VGR 100" , the dose of that pill in milligrams in the other. Viagra is a name registered close next to carefull of the pharmaceutical company Pfizer.Be when you request viagra online to have company of Pfizer like jet. It is safe Viagra to use? The drug was patented in 1996, approved for the use in eréctil dysfunction by the Medecine Agency and Foods the 27 of March of 1998, becoming the first pill approved to treat eréctil dysfunction in the United States, and offered for the sale in the United States advanced more that year. He was approved lately by the EU in Europe and you request viagra surely online. More information of Viagra: The physiological mechanism of viagra implies the launching of nitric oxide (NOT) in the cavernosum of the sexual body during stimulation.NO later activates the cyclase of guanylate of the enzyme, that gives rise cyclical monophosphate to increasing level of the guanosina (cGMP), producing the relaxation of the smooth muscle in the carvernosum of the compilation and allowing the affluence of the blood. You once use Viagra like a tablet to the day, near 1 hour before sexual activity. If you have eréctil the problems they request viagra online. Nevertheless, Viagra can be taken anywhere to divide 30 minutes for 4 hours before the sexual activity. The Viagra order online does not have ninguÌ  n direct effect of relaxation on isolated human cavernosum of the compilation, but it heightens the effect of not inhibiting the type of fosfodiesterasa 5 (PDE5), that is responsible for the degradation of cGMP in the cavernosum of the compilation. When the sexual stimulus causes the local launching of NO, the inhibition of PDE5 of Viagra causes to increasing levels of cGMP in the cavernosum of the compilation, giving by result the relaxation of the smooth muscle and the affluence of the blood to the cavernosum of the compilation. Viagra asks online surely, because the recommended doses do not have ninguÌ  n effect in the absence of sexual stimulus. It stores in the room temperature in 77 degrees of F (25 degrees of C) far from the light and of the humidity. Brief storage between 59-86 degrees F (degrees C are allowed 15-30). It does not store in the bathroom. It requests viagra online, and it takes the complete advantages from the pill of viagra. It keeps all the medicines far from children and of domestic animal. It rejects this product correctly when it is expired or it is needed not more. Order viagra of `t of Don online if you have suffered of an attack of the heart, movement or dangerous arrhythmia for the life within the 6 past months you must discuss other options with his doctor.

How sex affects the body when a man sexual is moved, the full penis quickly of more blood than generally. The penis later is extended and hardened. This is called an erection. After they do to the man having sex, this additional flows of blood of the penis again within the body. The erection leaves. If a hard erection during long time (more than 6 hours), can damage its penis permanently. You must call immediately to a doctor if you never have a prolonged erection that lasts more than four hours. Some conditions and medicines interfere with this natural process of the erection. The penis cannot fill enough of blood. The man cannot have an erection. This is called eréctil dysfunction if it becomes a frequent problem. Before you begin any treatment for eréctil dysfunction, she asks his doctor if its heart is quite healthy to handle to the additional tension of having sex.