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Physicians should consider the cardiovascular status of their patients, since there is a degree of cardiac risk associated with sexual activity. Therefore, treatments for erectile dysfunction, including Cialis, should not be used in men for whom sexual activity is inadvisable as a result of their underlying cardiovascular status. Patients who experience symptoms upon initiation of sexual activity should be advised to refrain from further sexual activity and seek immediate medical attention. swollen joints

get cialis Clinical StudiesThe following adverse reactions have been identified during post approval use of Levitra. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or establish a causal relationship to drug exposure.dryness, redness, scaling, or peeling of the skin

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Hearing LossYour doctor will review your complete medical history before writing a prescription for Viagra to treat male impotence. Viagra is not suitable for all patients. You should not take Viagra if you have certain cardiovascular conditions, including high blood pressure. Patients with kidney problems, liver damage, sickle cell anemia, bleeding disorders, leukemia, or multiple myeloma may not be able to take Viagra. Tell your doctor if you have any of these conditions.

Vardenafil HCl is designated chemically as piperazine, 1-[[3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f ][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]-4-ethyl-, monohydrochloride and has the following structural formula: viagra prescriptions If you are older than 65 or have liver problems, your doctor may start you on a lower dose of Levitra.Abnormal vision* 1% 2% 11% 1%

Men who are sexually active at that clip — twice a week or more — may also find themselves running out of pills, since most insurance plans that cover these erectile-dysfunction medications (and not all do) limit prescriptions to six or eight pills per month.Studies in vitro have shown that tadalafil is a selective inhibitor of PDE5. PDE5 is an enzyme found in corpus cavernosum smooth muscle, vascular and visceral smooth muscle, skeletal muscle, platelets, kidney, lung, and cerebellum. The effect of tadalafil is more potent on PDE5 than on other phosphodiesterases. Tadalafil is >10,000-fold more potent for PDE5 than for PDE1, PDE2, and PDE4 enzymes which are found in the heart, brain, blood vessels, liver, and other organs. Tadalafil is >10,000-fold more potent for PDE5 than for PDE3, an enzyme found in the heart and blood vessels. This selectivity for PDE5 over PDE3 is important because PDE3 is an enzyme involved in cardiac contractility. Additionally, tadalafil is approximately 700-fold more potent for PDE5 than for PDE6, an enzyme which is found in the retina and is responsible for phototransduction. Tadalafil is also >10,000-fold more potent for PDE5 than for PDE7 through PDE10.