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Forty married men with erectile dysfunction who had taken sildenafil or vardenafil at the maximum recommended doses and had not responded to the treatment were included. They were treated with tadalafil, 20 mg, at least 4 doses at different days. The effectiveness of the treatment was reviewed by different questionnaires, including the International Index of Erectile Function-5 (IIEF-5), Sexual Encounter Profile (SEP) questions 2 and 3, and the Global Assessment Question (GAQ), at the end of the 12th week.
Owing to their vasodilatory effects, the phosphodiesterase-5 inhibitors have become widely used for the treatment of erectile dysfunction. Among the reported adverse events of these agents are epistaxis, variceal bleeding, intracranial hemorrhage, and hemorrhoidal bleeding. We report a case of vocal fold hemorrhage that occurred after vardenafil use in a 31-year-old man who was a professional singer.
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Post hoc subgroup analysis of a 12-week study of the influence of lipid levels and presence of metabolic syndrome on the efficacy of vardenafil as measured by International Index of Erectile Function-Erectile Function (IIEF-EF) domain score, responses to Sexual Encounter Profile (SEP) SEP2 and SEP3 questions, duration of erection leading to successful intercourse, and erection duration regardless of the answer to SEP3. Lipid values were obtained at study start, after patients had received at least 3 months of therapy with a statin.
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Sociopsychological factors play a critical role in the pathogenesis of erectile dysfunction (ED). An optimal therapeutic regimen is supposed to bring sociopsychological benefits to both the patients and their partners. Psychological and Interpersonal Relationship Scales (PAIRS) is an effective measure for evaluating the impact of ED on the psychological aspects and interpersonal relationship of the patients and their partners, as well as for predicting the satisfaction of ED patients with the treatment. PAIRS scores on the effects of phosphodiesterase type 5 inhibitors on ED show a significant decrease in sexual activity-related time concerns of the patients treated with tadalafil, as compared with those medicated with sildenafil or vardenafil. This also underlies the preference of the patients and their partners for tadalafil in clinical practice. The drug attribute associated with the decreased time concerns is the long and outstanding efficacy of tadalafil for up to 36 hours.
Patients with CSC had no increase in prescription exposure to PDE-5 inhibitors than did age-matched control subjects. Although the findings in this study do not support an association between CSC and PDE-5 inhibitors, postmarketing surveillance methods for drug-related side effects have acknowledged limitations.
The main outcome measure was the percentage of subjects with a return-to-normal erectile function (IIEF-EF domain score ≥ 26) when treated with tadalafil once daily compared with placebo.
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We evaluated the effects of vardenafil on testicular androgen-binding protein secretion (ABP). Bilaterally obstructed azoospermic (OA)-men (n = 19) (group A) underwent unilateral testicular biopsy. A group of nonobstructed azoospermic (NOA)-men (n = 68) (group B) underwent bilateral testicular biopsy. ABP secretion in vitro by testicular tissue was assessed in each participant of every group. In addition, intracytoplasmic sperm injection (ICSI) cycles were performed in several couples of group A or group B using frozen/thawed spermatozoa from the biopsy material. Ten OA-men (group A1), 14 NOA-men (group B1), and nine different NOA-men (group B2) had been positive for spermatozoa in the biopsy but pregnancies were not achieved in the respective female partners. Men of groups A1, B1 and B2 were treated with vardenafil, vardenafil and L-carnitine respectively. Then, the men of groups A1, B1 and B2 underwent a second testicular (unilateral) biopsy. Within the group A1 and within the group B1, ABP secretion rate was significantly larger after vardenafil treatment than prior to vardenafil treatment. In addition, fertilisation rates in ICSI cycles within groups A1 or B1 were not affected by vardenafil administration. Vardenafil administration in NOA-men increased ABP secretion and did not affect detrimentally the presence of testicular foci of advanced spermatogenesis.
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Avanafil has a favorable phosphodiesterase-5 selectivity profile compared to that of marketed phosphodiesterase-5 inhibitors. Avanafil shows excellent in vitro and in vivo potency, and fast onset of action for penile erection. Cumulative data suggest that avanafil has a promising pharmacological profile for erectile dysfunction.
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Administration of vardenafil before the induction of ischemia resulted in a significant reduction in creatinine and FENa levels as well as in less histological lesions observed in treated kidneys in comparison with the vehicle-treated group. The underlying mechanism of cytoprotection was cGMP depended and involved the phosphorylation of ERK proteins. Renal scintigraphy confirmed that PDE5 inhibition attenuates renal IRI.