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There are no adequate studies in humans to determine risk, but animal studies did not demonstrate harm to the fetus. Cialis and Viagra are both effective treatments for impotence. However, each comes in different dosages and work in different ways. Cialis should be stored at room temperature out of direct sunlight. This ensures that your Cialis stays effective at treating your erectile dysfunction.

Administration of CIALIS to patients who are using any form of organic nitrate, either regularly and/or intermittently, is contraindicated. In clinical pharmacology studies, CIALIS was shown to potentiate the hypotensive effect of nitrates [see CLINICAL PHARMACOLOGY] . For CIALIS for once daily use in men with BPH, patients should be instructed to take one tablet at approximately the same time every day.

A healthcare provider can diagnose and treat Peyronie’s disease. Sildenafil is a potent and selective inhibitor of cGMP-specific phosphodiesterase type 5 (PDE5), which is responsible for degradation of cGMP in the corpus cavernosum. Other drugs that operate by the same mechanism include tadalafil (Cialis) and vardenafil (Levitra). Tadalafil is the generic, unbranded version of Cialis, and both are effective treatments for erectile dysfunction in adult men.

Neither Viagra or Cialis will cause an erection on their own. The Food and Drug Administration (FDA) regulates pharmaceuticals that contain an active pharmaceutical ingredient. Various underlying physical and mental conditions can contribute to erectile dysfunction.

When PDE5 is blocked, cGMP levels increase, leading to the relaxation of smooth muscle cells in blood vessels. This increases blood flow, which can help treat conditions like erectile dysfunction and pulmonary hypertension. PDE5 inhibitors improve symptoms of erectile dysfunction (ED) by preventing the breakdown of a substance called cyclic GMP (cGMP). CGMP acts as a vasodilator, which means it relaxes smooth muscle and widens blood vessels allowing more blood flow into tissue. This also increases blood flow into the corpus cavernosum