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VIAGRA really should not be applied with REVATIO or with other PAH therapies made up of sildenafil or another PDE5 inhibitors (which include Adcirca® [tadalafil])g., creatinine clearance < thirty mL/min), and concomitant utilization of erythromycin or robust CYP3A4 inhibitors, plasma levels of sildenafil at 24 several hours article dose are discov