3. Taking the measure of a man Age associated incidence of ED 1. J Urol Vol 161(1) Jan 1999 pp 5 - 11
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12. Taking the measure of a man Just nitrates Just nitrates Avoid a-blockers Nitrates N / A N / A Avoid food and / or alcohol Standard dose 20 mg ½ hour Standard dose 20 mg ½ hour Titrate dose 25, 50, 100 mg 1 hour to onset Levitra R Tadalafil Sildenafil citrate
13. Taking the measure of a man strongest weakest In Vitro potency intermediate Levitra R ½ life 4 – 5 hours Tadalafil ½ life 17.5 hours Sildenafil citrate ½ life 3 – 4 hours