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an erection that won't go away (priapism). If you have an erection that lasts over 4 hrs, get health care enable without delay. If It is far from addressed at once, priapism can forever destruction your penisVIAGRA may perhaps influence just how other medicines get the job done, together with other medicines may perhaps affect the best way VIAGRA i

unexpected eyesight reduction in a single or both eyes. Sudden eyesight reduction in a single or both equally eyes can be a sign of a significant eye trouble known as non-arteritic anterior ischemic optic neuropathy (NAION).The inhibition of PDE5 in some of these tissues by sildenafil will be the foundation for the enhanced platelet antiaggregatory