Complete Tabs are not right for everyone. You should not use them if you take nitrates (such as nitroglycerin) or guanylate cyclase stimulators like riociguat, or if you have certain heart, blood-pressure, liver, or vision conditions. Tell your clinician about all medications you take and your full medical history. Please review the Important Safety Information, and seek emergency care for an erection lasting more than 4 hours.