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Levitra (Vardenafil)

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Levitra is a powerful medication used for the treatment of all kinds of erectile dysfunction (impotence). Levitra helps men achieve and keep a strong erection in response to a sexual stimulation. Levitra can be taken by men who suffer from type 1 or type 2 diabetes, high blood pressure or high cholesterol.

Other names for this medication:

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Also known as:  Vardenafil.


Levitra is an ideal preparation in the treatment of different forms of erectile dysfunction (ED). Levitra allows the user to achieve and maintain a hard erection. Levitra can be taken by men who suffer from type 1 or type 2 diabetes, high blood pressure or high cholesterol.

The active ingredient Vardenafil, a phosphodiesterase type 5 inhibitor (PDE-5 inhibitor), stimulates the release of nitric oxide (NO) in the corpus cavernosum in response to sexual stimulation. Nitric oxide activates the lyase enzyme which results in increased levels of cyclic guanosine monophosphate (cGMP). This relaxes smooth muscles in blood vessels of the corpus cavernosum, increasing blood flow and thus inducing an erection. The action of Levitra may last up to 6 hours.

Levitra effectively prolongs sexual performance but can be indicated as a remedy to prevent premature ejaculation only along with the treatment of ED.

Levitra is also known as Vardenafilum, Vivanza, Vardif®, Vilitra.

Levitra doesn't protect you or your partner from sexually transmitted diseases (including HIV) or from pregnancy.


Take Levitra orally with a full glass of water 30-60 minutes before sexual intercourse.

Avoid fatty foods as this may affect the effectiveness of the medication.

The effect lasts for 4-6 hours.

The dosage depends on the overall health.

You should take Levitra when it is suitable for you and your partner.

Levitra must not be taken more than once a day.


If you take an overdose of Levitra, you should seek emergency medical attention or contact your healthcare provider immediately.


Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F) and away from excess moisture and heat. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Levitra are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not take Levitra if you are allergic to any of Levitra’s components.

Do not take Levitra if you are also using organic nitrates, nitrate drugs for chest pain or heart condition (e.g., nitroglycerin, isosorbide dinitrate and isosorbide mononitrate), nitrates as amyl nitrate or nitrite ("poppers").

Do not take Levitra if you take other medications to treat erectile dysfunction or pulmonary arterial hypertension, such as riociguat (Adempas).

Do not take Levitra if you are taking erythromycin, alpha-blockers, ketoconazole, itraconazole (Sporanox or Nizoral), ritonavir (Norvir) or indinavir (Crixivan).

Do not consume alcohol while using Levitra, as it can lower your blood pressure, causing dizziness and rapid heart rate (tachycardia).

Do not drive or operate machinery while taking the medication.

Contact you doctor or health care professional right away if your erection lasts longer than 4 hours or if it becomes painful.

Levitra does not protect you or your partner from sexually transmitted diseases or pregnancy.

Levitra can be dangerous for children and women.

Levitra can be taken by men who suffer from type 1 or type 2 diabetes, high blood pressure or high cholesterol.

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Morbi-mortality in cystic fibrosis (CF) is mainly related to chronic lung infection and inflammation, uncontrolled tissue rearrangements and fibrosis, and yet the underlying mechanisms remain largely unknown. We evaluated inflammatory and fibrosis responses to bleomycin in F508del homozygous and wild-type mice, and phenotype of fibroblasts explanted from mouse lungs and skin. The effect of vardenafil, a cGMP-specific phosphodiesterase type 5 inhibitor, was tested in vivo and in culture. Responses of proinflammatory and fibrotic markers to bleomycin were enhanced in lungs and skin of CF mice and were prevented by treatment with vardenafil. Purified lung and skin fibroblasts from CF mice proliferated and differentiated into myofibroblasts more prominently and displayed higher sensitivity to growth factors than those recovered from wild-type littermates. Under inflammatory stimulation, mRNA and protein expression of proinflammatory mediators were higher in CF than in wild-type fibroblasts, in which CFTR expression reached similar levels to those observed in other non-epithelial cells, such as macrophages. Increased proinflammatory responses in CF fibroblasts were reduced by half with submicromolar concentrations of vardenafil. Proinflammatory and fibrogenic functions of fibroblasts are upregulated in CF and are reduced by vardenafil. This study provides compelling new support for targeting cGMP signaling pathway in CF pharmacotherapy.

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Vardenafil significantly improved treatment satisfaction in men with ED, and in their partners. The results provide further evidence of the validity of the TSS.

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Primary efficacy variable was the between-group difference in change in International Index of Erectile Function-Erectile Function domain (IIEF-EF) score from baseline to end of washout. Secondary variables included change from baseline in proportion of positive respondents to Sexual Encounter Profile questions and in satisfaction with treatment as assessed with the Treatment Satisfaction Scale (TSS).

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This study demonstrated that vardenafil had no adverse effects on sperm concentration, compared with sildenafil and placebo, when administered daily at the maximum recommended dose for 6 months. Specifically, use of vardenafil for 6 months does not impair sperm concentration, total sperm count per ejaculate, or sperm morphology and motility. Levels of reproductive hormones were also unaffected.

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Phosphodiesterase type 5 inhibitors are the first choice therapy in the treatment of erectile dysfunction. Many men in their reproductive years are now using phosphodiesterase type 5 inhibitors. The purpose of this study was to determine the effects of 6 months of treatment with 20 mg vardenafil, compared with 100 mg sildenafil and placebo, on semen characteristics and reproductive hormones in men with and without erectile dysfunction.

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To investigate the effects of phosphodiesterase type 5 (PDE5) inhibitors on erectile variables during a period with no sexual stimulation in a laboratory setting double-blind study.

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To evaluate the effects of Huafenqinutang combined with vardenafil for the treatment of chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) with erectile dysfunction.

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The aim of this study was to evaluate the safety and efficacy of vardenafil in outpatients with chronic schizophrenia and erectile dysfunction and to investigate any effect on quality of life in this population.

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In this placebo-controlled, double-blind, multicentre parallel-group study, men with mild-to-moderate ED were randomised to 24 wk of treatment, followed by a 4-wk washout.

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Phosphodiesterase 5 inhibitors are preferred by most men for the oral treatment of erectile dysfunction. In many guidelines, this therapy is recommended as first-line therapy because of convenience, high efficacy, and low rates of side-effects. Sildenafil was the first drug for the treatment of erectile dysfunction, introduced in 1998. There are now two new phosphodiesterase 5 inhibitors, vardenafil and tadalafil, for which approval was recently given in the European Union and is expected this year in the United States.

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More than one-third of men may experience erectile dysfunction (ED) after nerve-sparing radical retropubic prostatectomy. A recent study has shown that vardenafil, a phosphodiesterase 5 inhibitor, could significantly improve the key indices of erectile function in men after unilateral or bilateral nerve-sparing radical retropubic prostatectomy. Few adverse events were observed in the study.

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The highest expression and biological activity of PDE5 was found in bladder. However, a consistent PDE5 expression and activity was also found in prostatic urethra. In contrast, the prostate gland showed the lowest PDE5 abundance and cultures derived from this tissue were less sensitive to vardenafil.

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The effect of vardenafil, a potent and highly selective phosphodiesterase-5 (PDE5) inhibitor, on symptom-limited exercise time, time to first awareness of angina, and time to ischemic threshold (ST-segment depression > or =1 mm from baseline) during exercise tolerance testing (ETT) was examined in patients with stable coronary artery disease (CAD).

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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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The phosphodiesterase type 5 (PDE5) inhibitors, sildenafil, tadalafil and vardenafil, are a class of medications that are safe and effective in treating erectile dysfunction (ED). Yet, resuming sexual activity following a period of abstinence in response to ED may be anxiety-provoking for the man, his partner and their relationship, causing the sexual encounter to become a stressful event. The differences between PDE5 inhibitors in terms of duration of action can be successfully utilized by healthcare professionals to mitigate some of the psychosocial barriers that interfere with treating ED. PDE5 inhibitors with a longer duration of responsiveness provide some men with ED and their partners, a treatment option that may offer greater flexibility and potentially less anxiety surrounding the resumption of sexual activity. Shorter-acting PDE5s may be preferred by men/couples with predictable sexual scripts, excellent communication strategies and concerns regarding the duration of side effects.

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Vardenafil was effective, reliable and well tolerated in patients with ED treated under real-life conditions.

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In women suffering from low sexual desire-associated with low attention for sexual cues-the combination of testosterone and vardenafil may be a promising new treatment.

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In this retrospective analysis, the percentage of patients "returning to normal" erectile function at week 12 (as defined by scores > or =26 on erectile function domain of International Index of Erectile Function [IIEF-EF]) was determined, with further stratification by baseline ED severity, etiology, age, and duration of ED.

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PDE4 expression and relaxations to PDE4 and PDE5 inhibitors and simultaneous measurements of [Ca2+]i and tension.

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Heme oxygenase (HO) enzyme catalyzes oxidative degradation of heme to biliverdin and carbon monoxide (CO). CO shares many properties with nitric oxide (NO) including the activation of soluble guanyl cyclase.

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Erectile dysfunction and depression are highly associated. Previous studies have shown benefits of phosphodiesterase-5 inhibitor treatment for erectile dysfunction associated with antidepressant therapy or subsyndromal depression. The present study assessed the safety and efficacy of vardenafil in men with erectile dysfunction and untreated mild depression.

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Vascular smooth muscle cells express endothelial nitric oxide synthase (eNOS) and produce nitric oxide (NO). Recently, increased NO production has been reported to induce the synthesis and secretion of vascular endothelial growth factor (VEGF) via the NO/cyclic guanosine 3',5'-monophosphate (cGMP) pathway. L-arginine (L-arg), the precursor of NO, and selective phosphodiesterase type 5 (PDE-5) inhibitors that increase levels of intracellular cGMP may complementarily enhance VEGF synthesis in corpus cavernosal smooth muscle cells (CCSMCs), and may consequently restore impaired endothelial function. Expression of eNOS in corpus cavernosal smooth muscle has also been reported. However, it is unclear whether CCSMCs can generate NO.

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In patients on the doxazosin gastrointestinal therapeutic system for benign prostatic hyperplasia a single 10 mg dose of vardenafil had no symptomatic hemodynamic effects.

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Ion mobility spectrometry was used as a rapid screening tool for the detection of acetildenafils, sildenafils and avanafil within adulterated herbal supplement matrices. Acetildenafils show a tendency for partial fragmentation during the desorption/ionization process affording two peaks in the ion mobility spectrum in addition to the intact compound. The fragmentation appears to occur α to the carbonyl group along the CN bond attaching the piperazine moiety, producing a common fragment (K₀=1.0280 cm²V⁻¹s⁻¹) along with the respective piperazine fragment. The sildenafils and avanafil afford one molecular ion peak per compound.

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CCSMCs express eNOS and synthesize NO. NO synthesis leads to enhancement of VEGF synthesis via the NO/cGMP pathway. Combined L-arg and vardenafil treatment, which can enhance VEGF production, may provide a novel therapeutic strategy for the treatment of erectile dysfunction as well as endothelial dysfunction in general.

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TSS domain scores increased from baseline to last observation carried forward (LOCF) in the vardenafil-treated men and untreated women partners, but exhibited little change for the placebo group (P < 0.0001 vs. placebo). For both patients and partners in the vardenafil group, correlations between TSS domains, the IIEF-EF and the mSLQQ-QoL scores at LOCF were moderate to strong.

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The objective of the present study was to determine the efficacy and safety of a fixed dose of vardenafil in the treatment of patients with erectile dysfunction (ED).

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Under doctor's office conditions vardenafil was reliable and highly effective, already at the 10 mg dose, when the patients utilized its effect within a time window ranging from < 0.5 to 12 hours (tablet ingestion to SI). In addition, vardenafil was very well tolerated. Patient satisfaction with the treatment was reportedly very high.

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The aim of this study was to compare the effect of the first intake of tadalafil and vardenafil in men with DN and DED.

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levitra online 2016-11-04

Long-term treatment with vardenafil is well tolerated and has buy levitra sustained beneficial effects on PAH, as measured by patients' exercise capacity, WHO functional class and haemodynamic parameters.

levitra and alcohol 2017-11-21

Vardenafil significantly buy levitra improves EF in hypertensive men treated with concomitant antihypertensive medication, is well tolerated, and does not significantly affect blood pressure.

levitra recommended dosage 2017-08-07

Fifteen occasional cannabis users participated in a double-blind, placebo-controlled, six-way cross-over study. On separate test days, subjects received combinations of pretreatment (placebo, vardenafil 20 mg or rivastigmine 3 mg) and treatment (placebo or 1,376 mg cannabis/kg body weight). Cognitive tests were administered immediately after inhalation of treatment was finished and included measures of memory (visual verbal learning task buy levitra , prospective memory test, Sternberg memory test), perceptual-motor control (critical tracking task), attention (divided attention task) and motor impulsivity (stop signal task).

levitra with alcohol 2017-09-15

Phosphodiesterase-5 (PDE-5) inhibitors are a well-established, first-line therapy for erectile dysfunction (ED). Extensive clinical trials and clinical experience established the highly significant efficacy and the safety of this class of drugs in the treatment of ED.Furthermore, the efficacy of PDE-5 inhibitors has been established in men with buy levitra ED with a broad range of etiologies and comorbidities. The future of PDE-5 inhibitors includes the expansion of indications such as the treatment of pulmonary hypertension and the potential of treatment of symptomatic BPH.

levitra 60 mg 2015-02-21

Forty female Wistar albino rats weighing 250-300 g were randomized into five experimental groups (each with n = 8) as follows:1) a sham group subjected to a sham surgical procedure and administered only tap water; 2) a control group subjected to a standardized surgical procedure to induce ischemic colitis and administered only tap water; 3) and 4) treatment groups subjected to surgical induction of ischemic colitis followed by the postoperative administration of 5 mg/kg or 10 mg/kg vardenafil, respectively; and 5) a treatment group subjected to surgical induction of ischemic buy levitra colitis followed by postoperative administration of pentoxifylline at 50 mg/kg/day per day as a single dose for a 3-day period. All animals were sacrificed at 72 h post-surgery and subjected to relaparotomy. We scored the macroscopically visible damage, measured the ischemic area and scored histopathology to determine the severity of ischemia. Tissue malondialdehyde levels were also quantified.

levitra brand 2016-08-06

Administration of vardenafil before the induction of ischemia resulted in a significant reduction in creatinine and FENa buy levitra 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.

levitra max dose 2016-08-11

In this study, we investigated the effect of buy levitra testosterone and vardenafil on sexual activity in female rats.

levitra weekend pill 2015-05-24

A rapid onset of action for phosphodiesterase type 5 inhibitors (PDE5is) emerged to be of clinical buy levitra importance in men treated for erectile dysfunction (ED). Data from randomized clinical trials (RCTs) showed a rapid onset of action for vardenafil 10 mg orodispersible tablet (ODT). However, the effectiveness of vardenafil ODT has never been tested in a real-life setting. We assessed the efficacy and time to onset of action of vardenafil ODT in men seeking medical help for ED in the everyday real-life clinical practice.

levitra 5mg dose 2017-04-08

To evaluate buy levitra the potential of sildenafil, vardenafil and tadalafil, all phosphodiesterase-5 (PDE-5) inhibitors used for treating erectile dysfunction, for treating benign prostatic hyperplasia (BPH) and lower urinary tract symptoms (LUTS).

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A total of 121 patients were included in the intention-to-treat analysis (61 on vardenafil and 60 on placebo). Of these, 16 in the vardenafil group and 14 in the placebo group had severe ED. There was a greater improvement in IIEF-EF domain score with vardenafil vs. placebo for all patients (score change of 10.9 vs. 1.6, respectively, P < 0.001) and for patients with severe ED (score change of 13.4 vs. 2.2, respectively, P = 0.011). A significant difference in favor of vardenafil was also observed for positive responses to the GAQ (73.8% vs buy levitra . 25.0%, P < 0.001). After 12 weeks, vardenafil-treated patients with severe ED showed a significant improvement in their self-esteem compared with patients receiving placebo (change from baseline -1.51 vs. 3.54, respectively, P = 0.036). Vardenafil treatment was well tolerated.

levitra 10mg reviews 2015-12-06

When compared with the non-diabetic controls, diabetic rats showed increased myocardial and vascular transforming growth factor buy levitra -beta1 expression, impaired left ventricular contractility (impairment of E(max) by 53%, PRSW by 40%; P < 0.05) and vascular dysfunction. Treatment with vardenafil resulted in higher cGMP levels, reduced transforming growth factor-beta1 expression, significantly improved cardiac function (improvement of E(max) by 95%, PRSW by 69%; P < 0.05) and greater vasorelaxation to acetylcholine and sodium nitroprusside in aortae from diabetic animals.

levitra 1 mg 2016-05-19

Vardenafil significantly improved erectile and ejaculatory function and was generally well tolerated in men with erectile dysfunction buy levitra due to spinal cord injury.

levitra 40 mg 2016-01-25

Vardenafil buy levitra has demonstrated efficacy for the pharmacological management of erectile dysfunction (ED). Accumulating evidence suggests that ED is frequently associated with underlying cardiovascular and metabolic conditions which are thought to be involved in the aetiology of ED. The present review aims to summarise and discuss the available evidence for the efficacy, safety and tolerability of vardenafil in patients with underlying conditions including diabetes, hypertension and dyslipidaemia.

levitra mail order 2016-08-29

Among 577 men, aged 59 years and younger with newly diagnosed CSC during the study year, 111 were prescribed a PDE-5 inhibitor (19.2%). The proportions of age-matched controls prescribed a PDE-5 inhibitor in the 2 groups were 18.5% and 21.5%. The odds ratio of exposure was 1.05 (95% confidence limit: 0.74-1.22) and Diflucan Alcohol Effectiveness 0.87 (95% confidence limit: 0.68-1.12).

levitra tablet 2016-01-07

The purpose of the study is to evaluate the effect of vardenafil on the histopathology and biochemical parameters in reducing damage in experimental ovarian ischemia and ischemia/reperfusion injury in Zofran Pill a rat model and to compare the effect of two different doses of vardenafil.

cheap levitra professional 2015-02-11

A total of 16 studies Artane Drug Interactions were reviewed. Studies using self-reported measures of sexual functioning showed mixed results whereas studies examining physiological effects of PDE5 on genital vasocongestion consistently report significant effects on genital sexual response.

levitra dosage cost 2015-07-06

To 18 healthy subjects and 18 patients with Child A liver cirrhosis, 10 mg of vardenafil, an Epivir Storage inhibitor of phosphodiesterase-5, were administered orally. Doppler sonographic measurements of hepatic and splanchnic blood flow, systemic blood pressure and heart rate were recorded before, 1 h after, and 48 h after the application. Vardenafil plasma levels were determined after 1 h. In five patients, invasive registration of free and wedged hepatic vein pressure was performed.

levitra 05 mg 2016-01-14

Three coprimary efficacy measurements (Sexual Encounter Performance [SEP]2, SEP3, International Index of Erectile Function-Erectile Function [IIEF-EF] domain scores) were used to assess the differential effect of vardenafil vs. placebo in this patient Casodex Drug Class population. Adverse events (AEs) safety data were obtained to compare safety outcomes.

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Primary outcome measure Benicar Generic Reviews was the percentage of subjects with an IIEF-EF score of > or =22 after the 2-mo washout period. Secondary variables included mean per-patient success rates for Sexual Encounter Profile (SEP) questions 2 and 3.

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1. The anococcygeus muscle is part of the erectile machinery in male rodents. Phosphodiesterase (PDE) 5 inhibitors enhance and prolong the effects of cGMP, which has a key role in penile erection. The aim of the present study was to provide a functional and biochemical comparison of the three PDE5 inhibitors, namely sildenafil, tadalafil and vardenafil, in the rat anococcygeus muscle. 2. Muscle strips were mounted in 4 mL organ baths and isometric force recorded. Levels of cGMP were measured using an enzyme immunoassay kit. Western blots were used to determine PDE5 protein expression. 3. The PDE5 inhibitors concentration-dependently relaxed carbachol-precontracted anococcygeus muscle; however, vardenafil was more potent (pEC(50) = 8.11 +/- 0.05) than sildenafil (7.72 +/- 0.06) or tadalafil (7.69 +/- 0.05). Addition of N(G)-nitro-l-arginine methyl ester (100 micromol/L) or 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (10 micromol/L) to the organ baths Avelox 800 Mg caused significant rightward shifts in concentration-response curves for all PDE5 inhibitors. 4. Sildenafil, tadalafil and vardenafil (all at 0.1 micromol/L) caused leftward shifts in the glyceryl trinitrate (GTN) concentration-response curves (by 4.0-, 3.7- and 5.5-fold, respectively). In addition, all three PDE5 inhibitors significantly potentiated relaxation responses to both GTN (0.01-10 micromol/L) and electrical field stimulation (EFS; 1-32 Hz), with vardenafil having more pronounced effects. 5. All three PDE5 inhibitors reduced EFS-evoked contractions in a concentration-dependent manner over the concentration range 0.001-1 micromol/L. There were no significant differences between the effects of the three PDE5 inhibitors. 6. Vardenafil (0.01-0.1 micromol/L) was more potent in preventing cGMP degradation in vitro than sildenafil (0.01-0.1 micromol/L) and tadalafil (0.01-0.1 micromol/L). 7. Under control conditions, the expression of PDE5 was higher in the anococcygeus muscle than in the corpus cavernosum. 8. In conclusion, PDE5 inhibitors enhance exogenous and endogenous nitric oxide-mediated relaxation in the rat anococcygeus muscle. The potency of vardenafil was greater than that of either sildenafil or tadalafil.

levitra 10mg tablets 2016-04-28

This was a pooled analysis of three randomized, double-blind, placebo-controlled, 12-week studies of flexible-dose vardenafil vs placebo, in men with ED for >/=6 months (n = 788) and their untreated female partners. Measures of efficacy included the Treatment Satisfaction Scale (TSS), International Index of Erectile Function, Erectile Function domain (IIEF-EF), and Sexual Encounter Profile (SEP) questions 2 and 3 (SEP-2, 'Were you able Zantac Blue Pill to insert your penis into your partner's vagina?'; and SEP-3, 'Did your erection last long enough for you to have sexual intercourse?'). In addition to the overall analysis, there was a subgroup analysis for potential moderators of response, e.g. whether patients who had undergone previous phosphodiesterase type 5 (PDE-5) treatment.

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To assess whether vardenafil would improve erectile function irrespective of Medication Naprosyn etiology, baseline severity, or patient age. The consistency of the response over time was also evaluated.

levitra mg 2015-08-30

The acute effects of intravenous (IV) injection of vehicle, vardenafil 0.03 mg Allegra With Alcohol /kg, BAY 60-4552 0.03 mg/kg or 0.3 mg/kg, or a BAY 60-4552 0.03 mg/kg plus vardenafil 0.03 mg/kg combination were evaluated in CN-crushed rats.

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Oral inhibitors of phosphodiesterase of type 5 (PDE-5) are drugs of choice in therapy of erectile dysfunction (ED). However, 20-30% patients do not respond to them. We studied potentialities of ultrasonic investigation (UI) of postcompression increase in cavernous arteries diameter (PICAD) after intake of vardenafil (levitra, Bayer&GlaxoSmithKline) which is a PDE-5 inhibitor in prediction of clinical efficacy of this medicine. A total of 75 males with ED participated in the study. Significant correlations were found between PICAD after vardenafil administration and clinical efficacy of the drug in patients with arteriogenic ED. The highest response to the drug was observed at PICAD value > or = 50%. High sensitivity and specificity of the PICAD threshold value obtained indicate high potentialities of the method in decision making on treatment policy Prograf Injection Dosage in patients with organic ED.

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Immunohistochemistry for PDE4 expression, myographs for isometric force recordings and fura-2 fluorescence Prednisone Maximum Dosage for simultaneous measurements of intracellular Ca2+ concentration ([Ca2+]i ) and tension for rolipram in bladder neck samples were used.

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The erectile response induced by co-administration of PT-141 and sildenafil was significantly greater than the response elicited by administration of sildenafil alone. Co-administration of PT-141 and sildenafil was safe and well-tolerated and did not result in new adverse events or adverse events that were increased in frequency or severity compared with monotherapy.

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Vardenafil (Levitra) is a potent and highly selective oral phosphodiesterase type 5 (PDE5) inhibitor. Vardenafil improved erectile function in men with mild to severe erectile dysfunction (ED) of varying aetiology in two randomised, double-blind, multicentre, fixed-dose studies of 12 or 26 weeks' duration. Men receiving vardenafil 10 or 20mg had significantly greater improvements in International Index of Erectile Function (IIEF) questionnaire erectile function domain scores than placebo recipients. Moreover, improvements in penetration and maintenance of erection (assessed using IIEF or Sexual Encounter Profile [SEP] questions) were significantly greater with vardenafil 5-20mg than with placebo. Improvements in IIEF intercourse satisfaction and orgasmic function domain scores were significantly greater with vardenafil 10 or 20mg than with placebo and the proportion of patients with a positive response to a Global Assessment Question (GAQ) concerning improvement in erections after 12 or 26 weeks' therapy was significantly higher with vardenafil 5-20mg than with placebo. Vardenafil improved erectile function in men with ED associated with diabetes mellitus or ED following unilateral or bilateral nerve-sparing radical retropubic prostatectomy in two randomised, double-blind, multicentre, fixed-dose, 3-month studies. In both studies, improvements from baseline in the erectile function domain score of the IIEF and in positive responses to SEP questions were significantly greater with vardenafil 10 or 20mg than with placebo. In addition, a significantly higher proportion of vardenafil 10 or 20mg recipients than placebo recipients had positive GAQ responses. Vardenafil was generally well tolerated in men with ED; treatment-emergent adverse events were of mild to moderate intensity and transient in nature. The most commonly reported adverse events (typical of those seen with PDE5 inhibitors) in vardenafil 5-20mg recipients included headache, flushing, rhinitis, dyspepsia and sinusitis. There were no reports of abnormal colour vision in men with ED taking vardenafil at clinically recommended doses (5-20mg).