Silagra 100 mg very effective but must be taken a minimum of half-hour before gender. Sildenafil Citrate belongs to a bunch of medicines called phosphodiesterase type-5 (PDE-5) inhibitors. It works by helping to relax the blood vessels of penis, allowing blood to flow into penis. The physiologic mechanism of erection of the penis involves release of gas (NO) within the corpus cavernosum during sexual stimulation
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