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AdipoGen Sildenafil citrate
Chemical. CAS 171599-83-0. Formula C22H30N6O4S . C6H8O7. MW 474.6 . 192.1. Synthetic. Potent cGMP-specific phosphodiesterase inhibitor that is highly selective for PDE5. It inhibits PDE5 activity in isolated rabbit platelets with an IC50 value of 3.6nM 3nM in human corpus cavernosum compared to inhibition of PDE1 and PDE3 activities IC50s = 0.26 and 65µM, respectively. Inhibition of PDE5 enhances the relaxation of smooth muscle in a range of vascular tissues by prolonging the nitric oxide/cGMP-mediated activation of cGMP-dependent protein kinase. While most notable for its use in the treatment of erectile dysfunction, sildenafil’s vasorelaxant properties have also been used to control vascular tone in pulmonary arterial hypertension and high-altitude pulmonary edema associated with altitude sickness. The citrate salt has superior water solubility and pharmacokinetics compared to the base salt of sildenafil.
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