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New applications
Recent data have indicated a potential association between epidemiological, physiologic, pathophysiologic, and treatment aspects of ED and lower urinary tract symptoms (LUTS) secondary to BPH. The 17.5 hour half-life of tadalafil makes it the most suitable PDE5 inhibitor for once-daily dosing in a trial of LUTS secondary to BPH. McVary and associates reported a multicentered, […]
Safety and drug interactions
As with every PDE5 inhibitor, tadalafil is absolutely contraindicated with nitrate medications for angina pectoris secondary to the potentiated hypotensive effect the drugs can have together. Because of the longer half-life, treatment with nitrate medications must be deferred for at least 48 hours after ingestion of tadalafil, compared with 24 hours for sildenafil (Viagra) and […]
Duration of action
Among the three PDE5 inhibitors, the half-life and thus duration of action is the pharmacologic parameter that is the most strikingly dissimilar. The half-life of tadalafil is 17.5 hours in normal healthy men and 21.6 hours in elderly men, while the half-lives of sildenafil and vardenafil are similar at 4 hours. This longer half-life provides […]
Background on outcome measures
Although the effectiveness of PDE5 inhibitors on such intermediate objective outcomes as penile rigidity through penile plethysmography with the RigiScan device (Dacomed Corporation, Minneapolis, MN, USA) has been studied, measuring the therapeutic effectiveness of tadalafil (Cialis Professional) is more accurately defined through an integration of the patient’s reported treatment response and tolerability with the reported […]