西地那非治疗ED时14min内即可显效

为测定枸橼酸西地那非治疗勃起功能障碍（ED）达到成功性交所需要的最少时间，Padma—Nathan H等进行了为期四周的双盲研究[Urology，2003，62（3）：400—403]。入选了曾使用100mg西地那非有效治疗≥2个月的ED患者（平均年龄60，ED平均病程7年），随机分为西地那非治疗组（115例）和安慰剂对照组（113例）。在进食2h后服用药物，患者利用计时表记录获得足够硬度进行成功性交的勃起时刻。结果显示，在服用药物14min和20min两个时点，服用西地那非组的完全勃起率分别为35％和51％，对照组则分别为22％和30％，经检验P均〈0．05。服用西地那非后至完全勃起完成性交的平均时间为36min，安慰剂组为141min。     

男科医生园地

西地那非在ED治疗中的起效和疗效维持时间西地那非是治疗勃起功能障碍(ED)的一线口服药,能给患者带来坚挺、持久的勃起。Eardley I等人进行的一项双盲、对照研究,再次证明了上述观点[Br J Clin Pharmacol,2002,53(Suppl 1):61S-65S]。研究分为两大组,研究Ⅰ包括17例ED患者,在服用西地那非50 mg或安慰剂后给予视觉性刺激(VSS),对促发勃起反应的起效时间进行评价。应用阴茎硬度测量仪对阴茎勃起硬度进行评价,如果患者在服药70 min后阴茎勃起硬度仍低于60%,则认为该患者的勃起反应起效时间为70 min。研究II包括16例ED患者,在服用西地…     

口服万艾可治疗ED的长期有效性和安全性以及随机撤药的影响

医生点评：该研究评价了西地那非治疗ED的长期有效性和安全性以及随机撖药的影响。对223例ED患者进行了16周的开放式研究及8周的双盲、固定剂量研究。在开放式研究中。有200例患者（93％）报告勃起功能得到改善。在双盲研究阶段，西地那非组在勃起频率和持续时间上仍保持较高的疗效水平，而换用安慰剂治疗组的指标回到了治疗前的水平。作者认为，口服西地那非治疗ED有效，且耐受性良好。为了保持并达到更好的效果，建议长期服用西地那非。     

固定剂量西地那非治疗不同病因ED有效且安全

为评价口服固定剂量的西地那非治疗不同病因勃起功能障碍(ED)的有效性和安全性。Montorsi F等进行了一个双盲、随机、安慰剂对照、固定剂量、为期12周的研究。514名ED男性(平均年龄56岁)随机接受25mg、50mg、100mg的西地那非或安慰剂治疗。患者中,器质性ED为32％,精神性ED25％,混合性ED为43％。西地那非或安慰剂在性生活前大约1小时服用,每天不超过一次。根据国际勃起功能指数(IIEF)问题3(能否达到勃起)和问题4(能否维持勃起)来确定治疗的有效性。其他     

西地那非治疗勃起功能障碍的临床进展

自1998年全球上市以来,西地那非治疗勃起功能障碍(erectiledysfunction,ED)积累了2千3百万患者的的临床应用经验,证明是有效的和安全的。本文对西地那非的作用机制、代谢过程进行回顾,对西地那非用于ED诊断、连续服用可治愈ED、规范性治疗、联合用药治疗ED、合并其他疾病时的治疗用药、循序渐进的ED治疗方案以及对视力影响的安全性等问题进行综述。     

西地那非治疗ED的起效和持续时间

为研究西地那非治疗勃起功能障碍(ED)的起效和持续时间。EardleyⅠ等在非器质性ED患者中进行了两个随机、双盲、安慰剂对照、双向交叉研究。研究一,17例ED患者在服用50mg两地那非或安慰剂后接受视觉性刺激,利用阴茎勃起功能综合监测装置进行检测,测定其开始勃起的时间。服药70分钟后阴茎勃起硬度不足60％。研究二,16例ED病例服用西地那非100mg或安     

西地那非治疗男性勃起功能障碍1200例临床应用体会

目的 评价口服西地那非治疗勃起功能障碍(ED)的疗效.方法 1200例ED患者服用西地那非治疗,其中心理性ED 789例(65.75%),器质性ED 162例(13.50%),混合性ED 249例(20.75%).结果 经服用西地那非治疗1006例取得有效和显效,总有效率83.83%,其中心理性ED 95.06%(750/789)、器质性ED 66.05%(107/162)、混合性ED 59.84%(149/249),本组口服西地那非治疗ED无重大不良反应发生.结论 西地那非为口服治疗ED一线药物,安全有效.     

轻到中度动脉性ED患者接受西地那非治疗后自发性勃起功能得到改善

为验证西地那非(50mg每晚服用持续一年)是否能改善轻到中度动脉性勃起功能障碍(ED)患者的自发性勃起功能(EF),Sommer F等人进行了一项前瞻性的开放性试验,研究入选112位男性ED患者,随机分为接受每晚西地那非50mg组或按需服用西地那非50mg或100mg组,随后进入1月和6月的非药物治疗期。非随机化、未服药ED患者也接受评估。用勃起功能国际指数(IIEF EF)的EF范围和阴茎海绵体动脉收缩速度峰值评估药物作用。结果显示在西地那非治疗后以及随后的非服药期,IIEF EF在48位夜间服药     

服用西地那非后成功性交的最短时间：一项随机、双盲、安慰剂对照的研究结果

西地那非是治疗勃起功能障碍(ED)的一线口服药物,经大量临床应用证实疗效确切、起效迅速。而服用西地那非后获得成功性交所需最短时间是多少呢?对此,Padma NH等人进行了相关研究[Urology,2003,62(3):400-403]。他们将服用西地那非(100mg)治疗2个月以上并有效的ED患者(平均年龄60岁;平均病程7年),随机分配至西地那非组(115例)和安慰剂组(113例),进行为期4周的双盲治疗研究。患者在餐后至少2小时服用西地那非,并采用秒表记录获得可以成功性交的勃起硬度所需时间。结果显示,西地那非治疗组在服药14min和20min内,分别有35%和51%的患者获得了…     

视听性刺激与性教育在西地那非治疗勃起障碍中的应用

目的探讨视听性刺激与性教育对服用西地那非无效的勃起障碍(ED)患者疗效。方法128例服药无效的ED患者,随机分为两组,治疗组64例接受夫妻性教育并服用西地那非100mg后接受视听性刺激诱导勃起。对照组给予常规门诊性教育,指导服药后的性刺激。治疗8周后后对性功能情况再次进行IIEF评分,评定疗效与安全性。结果完成治疗并进行有关检查者120例,治疗组61例,对照组59例。治疗组显效率、总有效率分别为31.12%、81.96%；对照组则为13.33%、62.71%,统计学处理两组有非常显著性差异(P＜0.01)。结论对服用西地那非无效的ED患者,采取性教育和视听刺激诱导勃起,使患者掌握正确的性刺激方法,可明显改善勃起功能,疗效明显优于传统的门诊服药指导。     

Sildenafil response is influenced by the G protein beta 3 subunit GNB3 C825T polymorphism: a pilot study

PURPOSE: Sildenafil is the oral phosphodiesterase-5 inhibitor that revolutionized treatment for erectile dysfunction. We investigated a potential association of the G protein beta 3 subunit (GNB3) C825T polymorphism, a determinant of intracellular signal transduction, with the drug response to sildenafil in patients with erectile dysfunction. MATERIALS AND METHODS: In 113 men with erectile dysfunction and 111 healthy male controls genotype status of the GNB3 C825T polymorphism was determined by polymerase chain reaction and restriction analysis. Patients with erectile dysfunction received sildenafil at a dose of 25 to 100 mg. according to the individual erectile response. Drug response was measured by interviewing the patient according to the erection scale of 0 to 5. RESULTS: The GNB3 genotype distribution of patients with erectile dysfunction exactly matched that of healthy controls. Analysis of the response to sildenafil revealed a significant association of C825T allele status with the erectile response to sildenafil. In the group with TT genotype we observed a 90.9% response but only a 50.9% and 48.9% response in patients with the CC and TC genotype, respectively. The odds ratio for a positive erectile response was 10.0 (95% CI 1.2 to 81.1) for patients with the TT versus the TC/CC genotype (p = 0.01). CONCLUSIONS: The response to sildenafil is significantly associated with GNB3 C825T genotype status in patients with erectile dysfunction.     

Sildenafil citrate (Viagra) treatment for erectile dysfunction: An updated profile of response and effectiveness

In the 7 years since sildenafil citrate (VIAGRA) was introduced as the first oral phosphodiesterase type 5 inhibitor therapy for erectile dysfunction, it has been used to treat nearly 27 million men with erectile dysfunction worldwide. Patient populations with erectile dysfunction of varying etiologies and with diverse comorbidities have benefited from sildenafil treatment. This update focuses on relatively recent research that further defines the response and effectiveness profiles of sildenafil and provides additional insight into optimizing treatment. In addition to providing recent data on sildenafil efficacy and safety/tolerability, the update provides data on assessments of erection hardness, measures of psychosocial outcomes (e.g., emotional well-being and treatment satisfaction), and treatment approaches to maximize response and effectiveness (e.g., by titrating to the maximum tolerated dose). Increased understanding of the sildenafil response and effectiveness profiles and optimal sildenafil treatment are central to the appropriate management of erectile dysfunction using sildenafil.     

Efficacy, safety and predictive factors of therapeutic success with sildenafil for erectile dysfunction in patients with different spinal cord injuries.

STUDY DESIGN: Multicenter, open, prospective, before-after study. OBJECTIVE: To assess the efficacy and safety of sildenafil therapy for erectile dysfunction in patients with spinal cord injury, and the association between the response to sildenafil and factors such as causes and levels of spinal cord injury, grade of ASIA deficit, time since injury, orgasmic perception, and degree of baseline erection. SETTING: Homes of outpatients of 16 spinal cord injury units in Spain. METHOD: One hundred and seventy patients with erectile dysfunction secondary to spinal cord injury, from whom baseline data were collected on their sexual function, and who started treatment with sildenafil 50 mg. An efficacy assessment was made by the patient and his partner, and the score of the International Index of Erectile Function (IIEF) was recorded. RESULTS: It was reported by 88.2% of the patients and 85.3% of their partners that treatment with sildenafil had improved their erections, regardless of the baseline characteristics of the spinal cord injury and erectile function. In responders, this improvement was confirmed by an increase from 12.5 to 24.8 points (P<0.001) of the Erectile Function Domain of IIEF. A significant improvement was also seen in patients' satisfaction with sexual activity and general satisfaction derived from sexual life. Preservation of orgasmic perception and a baseline degree of erection of 3 or 4 (P=0.006) were predictors of therapeutic success. No serious adverse events occurred. CONCLUSION: Sildenafil is an effective, well-tolerated treatment for erectile dysfunction caused by spinal cord injury, regardless of the cause, neurological level, ASIA grade, and time since injury. SPONSORSHIP: Spanish Society of Paraplegia.     

Efficacy, safety and patient acceptance of sildenafil citrate as treatment for erectile dysfunction

PURPOSE: We assessed the efficacy and safety of sildenafil citrate as treatment for erectile dysfunction. MATERIALS AND METHODS: A total of 433 completely evaluated men with chronic erectile dysfunction were treated with sildenafil citrate. Response was assessed prospectively by baseline and followup physician interviews, and by a patient self-administered 15-item questionnaire on the domains of patient treatment response and satisfaction, partner treatment satisfaction, comparative previous treatment satisfaction, adverse effects, and patient and partner quality of life. RESULTS: Of the 304 men (70.2%) who completed the questionnaire 278 received sildenafil, including 186 who previously had undergone treatment for erectile dysfunction, principally involving intracavernous injection therapy. A response was elicited by a median dose of 100 mg. in 188 patients (67.6%) who achieved erection suitable for sexual intercourse. Those with psychogenic erectile dysfunction responded significantly better than those with organic dysfunction (p <0.001). Erection suitable for intercourse was attained by 30.8% of patients with erectile dysfunction after radical prostatectomy and 80% with cavernous veno-occlusive dysfunction. Of previous intracavernous injection responders 29.9% were refractory to sildenafil, while 33. 3% of previous intracavernous injection nonresponders responded to sildenafil. The sildenafil response was considered inferior to the intracavernous injection response by 43.6% of the men who previously responded to intracavernous injection, of whom 51.5% continued to receive intracavernous injection as the only treatment (19.5%) or as an alternative to sildenafil (32%). Adverse effects in 53.6% of cases were assessed as mild in 56.4%, moderate in 38.3% and severe in 5.3%. Multiple adverse effects were reported by 62.4% of patients, while 17 (6.1%) discontinued sildenafil as a direct result of intolerable adverse effects. The most common adverse effects were facial flushing in 33.5% of cases, headaches in 23.4%, nasal congestion in 12.6%, dyspepsia in 10.1% and dizziness in 10.8%. Baseline patient and partner quality of life scores significantly improved after sildenafil treatment (p <0.001), while significantly improved quality of life was noticed by 51.5% and 43.1%, respectively. CONCLUSIONS: Sildenafil citrate is effective oral first line treatment for erectile dysfunction. Although more than 50% of men reported adverse effects, most were considered mild and rarely resulted in treatment cessation. There was a trend in those on intracavernous injection who responded to sildenafil to continue intracavernous injection as the only therapy or as an alternative to sildenafil. Also, we noted that some cases refractory to sildenafil responded to intracavernous injection. These findings imply that intracavernous injection remains an effective erectile dysfunction treatment option.     

他达拉非治疗ED的进展

他达拉非是治疗ED的有效药物,大量的研究已经证实了其在ED患者中的临床疗效。相对于西地那非和伐地那非,他达拉非最为显著的特点是它的长效性,接受治疗的ED患者可以在长达36 h的时间窗内自然地达到有效的勃起。他达拉非对患有内科合并症的ED患者具有良好的疗效,它还能有效地改善患者的心理以及晨勃现象,使患者恢复生活的自信。他达拉非的长效性使患者性生活符合“自然、愉快、正常的性生活”这一治疗要求,从而成为越来越多患者的首选药物。     

Erectile dysfunction and the effects of sildenafil treatment in patients on haemodialysis and continuous ambulatory peritoneal dialysis.

BACKGROUND: Sexual dysfunction, including erectile dysfunction, is common in patients with uraemia. Despite successful treatment of male sexual dysfunction with sildenafil in non-uraemic population, its efficacy in dialysis patients is unknown. PATIENTS AND METHODS: In this study, 35 male HD patients (mean age 48+/-12 years) and 15 male CAPD patients (mean age 44+/-12 years) were included. In the baseline period, haemoglobin, serum urea, and albumin, Kt/V, several hormonal parameters, Beck depression scale, and penile Doppler blood flow, (peak systolic velocity after intracavernous papaverine administration) were measured. The international index of erectile function (IIEF) form was used to evaluate erectile dysfunction. Sildenafil was given to patients with erectile dysfunction at a dose of 50-100 mg/day twice a week. RESULTS: The percentage of erectile dysfunction was similar between patients on HD (71%) and those on CAPD (80%). Patients with erectile dysfunction were significantly older and had lower free-testosterone serum levels and penile blood flow than those without. In linear regression analysis for baseline IIEF score, penile blood flow was the only independent variable associated with erectile dysfunction. IIEF score increased to a similar extent after sildenafil treatment in both HD patients (from 8.10+/-5.54 to 21.70+/-9.61, P<0.001) and CAPD patients (from 9.90+/-3.87 to 21.60+/-10.18, P=0.011). Changes in IIEF scores after sildenafil treatment were associated with baseline penile blood flow as an independent variable by linear regression analysis. Adverse events observed during sildenafil treatment were dyspepsia in two patients and headache in one patient. CONCLUSION: The rate of erectile dysfunction is high in dialysis patients. Penile blood flow is the most important factor for predicting both the development of erectile dysfunction and the response to sildenafil therapy in such patients. Oral sildenafil is an effective, reliable, well-tolerated treatment for uraemic patients with erectile dysfunction.     

发挥西地那非最佳疗效的若干措施

西地那非治疗勃起功能障碍(ED)的疗效的最佳发挥与患者对药物正确使用知识的了解程度、药物获取的途径以及ED基础疾病等密切相关。对于西地那非治疗初期“无反应”的患者,完善的跟进指导(患者健康教育、摸索合适剂量、尝试足够的用药次数、有效的随访以及尝试长期睡前规律用药等)是提高其疗效的重要措施。     

Evidence for contamination of herbal erectile dysfunction products with phosphodiesterase type 5 inhibitors

PURPOSE: We determined if pharmacological dosages of phosphodiesterase type 5 inhibitors (PDE5) inhibitors were present within a group of natural products marketed for the treatment of erectile dysfunction. MATERIALS AND METHODS: Seven herbal products marketed for the treatment of erectile dysfunction were purchased via the Internet or at local health food stores. Specimens were batched, relabeled and blindly analyzed for contamination with PDE5 inhibitors. High performance liquid chromatography and mass spectrometry were used to detect evidence of contamination with sildenafil, tadalafil or vardenafil. RESULTS: Of the 7 tested products 2 contained pharmacological dosages of sildenafil and tadalafil. Contamination with vardenafil was not identified. Mean dosages of sildenafil and tadalafil were 30.2 and 19.7 mg, respectively. CONCLUSIONS: A significant proportion of natural products marketed for erectile dysfunction contains PDE5 inhibitors. Although marketed as natural products devoid of adverse effects, these agents are known to have potentially fatal drug interactions with nitrates. Better regulation of the natural health products industry is urged.     

Erectile dysfunction in men with obstructive sleep apnea syndrome: a randomized study of the efficacy of sildenafil and continuous positive airway pressure

The aim of this study was to compare the efficacy of sildenafil and continuous positive airway pressure (CPAP) in men with erectile dysfunction (ED) and obstructive sleep apnea syndrome (OSAS). In all, 30 men were randomly treated for 12 weeks either with sildenafil 100 mg before intercourse (15 men) or CPAP during night time sleep (15 men). Under sildenafil, 97/180 (53.9%) of attempted intercourses were successful compared to 33/138 (23.9%) under CPAP. The mean IIEF (erectile function domain score) was 12.9 and 9.3 after sildenafil and CPAP treatment, respectively (P=0.007), compared to 7.9 and 7 at baseline. In all, 53.3% of patients were satisfied with sildenafil and 20% with CPAP for ED treatment (P=0.058). Although sildenafil was superior to CPAP, comorbidities and OSAS per se possibly resulted in a lower effectiveness of sildenafil compared to that in the general population of ED men. While about half of the patients were not satisfied even with the more effective treatment, we conclude that a combination of the two therapeutic tools or a different therapeutic mode should be studied further.