CONTRAINDICATIONS Administration of CIALIS to patients using any form of organic nitrate is contraindicated. CIALIS was shown to potentiate the hypotensive effect of nitrates (4.Cialis, phosphodiesterase tip 5 inhibitörleri ailesi süresince s?n?fland?r?larak, bu enzimlerin aktivitesini printlayarak cinsel performans?n zaitr?lmas?na yard?mc? olabi