il farmakokinetika ta vardenafil (20 mg) ma nbidlitx meta ingħata flimkien ma  l antagonist ta  h2 ranitidine (150 mg darbtejn kuljum) digoxin warfarin glibenclamide alkoħol (medja tal livell massimu ta alkoħol fid demm ta 73 mg/ dl) jew doża waħda ta  antaċidi (magnesium hydroxide/ aluminium hydroxide)