Because this is an average, you may notice better effects if you have sex a little sooner or a little later than this 2-hour timeframe. In studies, Cialis improved erectile function as soon bey 30 minutes to kak?m long as 36 hours after a dose was taken.Bunun nispetle sakil böbrek yetmezli?i olan hastalarda kullan?lmamal?d?r. Böbrek yetmezli?ine