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VIAGRA shouldn't be employed with REVATIO or with other PAH treatment options made up of sildenafil or almost every other PDE5 inhibitors (for instance Adcirca® [tadalafil])This metabolite includes a PDE selectivity profile just like sildenafil and an in vitro potency for PDE5 close to 50% in the mum or dad drug. Plasma concentrations of the metab