TADALI (ALPHA) 10TAB Х 100MG

The drug for the treatment of erectile dysfunction is a reversible selective inhibitor of the specific PDE5 cGMP. When sexual arousal causes local release of nitric oxide, inhibition of PDE5 by tadalafil results in increased cGMP levels in the corpus cavernosum of the penis. The consequence of this is relaxation of the smooth muscles of the arteries and blood flow to the tissues of the penis, which causes an erection. Tadalafil is ineffective in the absence of sexual stimulation. In vitro studies have shown that tadalafil is a selective PDE5 inhibitor. PDE5 is an enzyme found in the smooth muscles of the corpus cavernosum, in the smooth muscles of the vessels of internal organs, in skeletal muscles, platelets, kidneys, lungs, and cerebellum. The effect of tadalafil on PDE5 is more active than on other phosphodiesterases. Tadalafil is 10,000 times more active against PDE5 than against PDE1, PDE2, PDE4, which are localized in the heart, brain, blood vessels, liver and other organs. Tadalafil is 10,000 times more potent at blocking PDE5 than 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 muscle contraction. In addition, tadalafil is approximately 700 times more active against PDE5 than against PDE6, which is found in the retina and is responsible for phototransmission. Tadalafil is also 10,000 times more active against PDE5, compared with its effect on PDE7-PDE10. It acts for 36 hours. The effect appears within 16 minutes after ingestion in the presence of sexual arousal. Tadalafil in healthy individuals does not cause a significant change in systolic and diastolic pressure, compared with placebo in the supine position (mean maximum decrease was 1.6/0.8 mmHg, respectively) and standing (mean maximum decrease was 0.2/4.6 mmHg, respectively). Tadalafil does not cause a significant change in heart rate. Tadalafil does not cause changes in color recognition (blue/green), which is explained by its low affinity for PDE6. In addition, there was no effect of tadalafil on visual acuity, electroretinogram, intraocular pressure and pupil size. There was no clinically significant effect on sperm characteristics in men taking tadalafil in daily doses for 6 months.