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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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Relaxant responses of human ureteral smooth muscle were investigated in vitro using the organ bath technique. Cyclic nucleotides cAMP and cGMP were determined by specific radioimmunoassays.

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Phosphodiesterase (PDE) 5 inhibitors reduce cyclic guanylate monophosphate breakdown, promoting vascular relaxation in the corpora cavernosa and penile erection during sexual stimulation. Sildenafil, vardenafil, and tadalafil were approved as effective treatments for male erectile dysfunction. Because PDE5 is present in artery and vein smooth muscle cells throughout the body, PDE5 inhibitors have mild systemic vasodilatory effects and thus the potential to impact the vascular system. The US Food and Drug Administration has approved PDE5 inhibitors for treating pulmonary hypertension. Moreover, their systemic vasodilating properties theoretically make these drugs suitable for treating hypertension. Studies indicate that PDE5 inhibition may be an option for reducing blood pressure in hypertensive patients. Additional benefits may be related to improved arterial stiffness and endothelial dysfunction, two early vascular abnormalities characterizing essential hypertension. More investigation is needed on PDE5 inhibitors as antihypertensive drugs, especially with slow-release formulations or compounds with long half-life. Studies on safety during long-term administration, interactions with antihypertensive and nonantihypertensive drugs, and effect on target organ damage are needed.

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383 patients were randomized to vardenafil (n=194) or placebo (n=189). Patients treated with vardenafil 8 hours before sexual activity achieved clinically meaningful (>or=18%) and statistically significantly greater least-squares mean per-patient SEP3 and SEP2 success rates over weeks 2-10, compared with patients receiving placebo (SEP3 69% vs 34%; SEP2 81% vs 51%; both p<0.001). SEP3 and SEP2 measures demonstrated the significant superiority of vardenafil over placebo from week 2 onwards (p<0.001). Measurements of IIEF-EF domain score, GAQ, GCQ and EQS showed that vardenafil led to significantly greater improvements in erectile function, compared with placebo (all p<0.001). Vardenafil was generally well tolerated.

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We examined whether phosphodiesterase-5 (PDE5) inhibition can promote ischemia-induced angiogenesis.

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Erectile dysfunction (ED) is a common medical condition that affects the sexual life of millions of men worldwide. Many drugs are now available for treating ED; oral pharmacotherapy represents the first-line option for most patients with ED. Sildenafil, an inhibitor of the enzyme phosphodiesterase type 5, is currently the most widely prescribed oral agent and has a very satisfactory efficacy-safety profile in all patient categories. Apomorphine SL is a dopamine D1- and D2-receptor agonist which has recently been approved for marketing in Europe. It is best selected for treating patients with mild to moderate ED. Vardenafil and tadalafil are new phosphodiesterase type 5 inhibitors which are expected to be approved this year. Both of them have significant positive efficacy-safety profiles. Patients who do not respond to oral pharmacotherapy or who cannot use it are good candidates for intracavernosal and intraurethral therapy. Alprostadil is the most widely used drug, both for injection therapy and for the intraurethral route. The efficacy of second-line treatment is high but the attrition rate remains significant.

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Complete T7-T8 spinalization was performed in 15 female adult Sprague-Dawley rats (250-275 g).

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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, prospective memory test, Sternberg memory test), perceptual-motor control (critical tracking task), attention (divided attention task) and motor impulsivity (stop signal task).

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Overall, 14,818 AEs were reported for sildenafil. There were 1,824 (12.3%) reported deaths, and reports of cardiovascular AEs numbered 2,406 (16.2%). Tadalafil was associated with 5,548 AEs and 236 deaths were reported. Vardenafil was associated with 6,085 AEs and 121 reports of deaths. The percentage of reported severe cardiovascular disorders has stabilized at 10% to 15% of all AE reports for sildenafil and tadalafil and 5% to 10% for vardenafil. Only 10% of AE reports sent to the FDA for PDE5-i were from pharmaceutical manufacturers.

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This study included 75 male patients that experienced ejaculation failure due to temporary ED during ART treatment. We treated the patients with PDE5 inhibitors sildenafil, tadanafil and vardenafil, and then evaluated the hardness of penile erection using Erection Hardness Score (EHS) and analyzed the end-point efficacy.

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The intercontraction interval and bladder capacity, and were decreased in SHRs and restored by vardenafil. The in vitro relaxant effect of the ROCK inhibitor Y-27632 was higher in bladder strips from SHR than from WKY and reduced by vardenafil. Nomega-nitro-L-arginine-methyl-ester (a NO-synthase inhibitor, 40 mg/kg/day during the last week of the 2-week treatment with vardenafil) partially antagonized vardenafil effect on Y-27632 responsiveness. Vardenafil prevented RhoA membrane translocation/activation, decreased ROCK activity, and increased cGMP levels in vivo (rat) and in vitro (hBCs). Exposing hBCs to vardenafil increased Ser(188) RhoA phosphorylation, to the same extent as the PDE5-insensitive PKG agonist Sp-8-Br-PET-cGMP. Moreover, vardenafil inhibited several RhoA-dependent functions in hBCs, including smooth muscle gene transcription and endothelin-1-induced migration. These effects were reverted by the PKG inhibitor KT 5823, further suggesting a cGMP/PKG-dependency. In hBCs, vardenafil was active in the low nanomolar range.

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Men aged 45-64 yr with BPH/LUTS and an International Prostate Symptom Score (IPSS) > or =12 were randomised to receive either 10mg vardenafil or placebo twice daily. LUTS were assessed with the use of two primary efficacy parameters, IPSS score and maximum urinary flow rate (Qmax), as well as postvoid residual (PVR) urine volume; ED was measured with the use of the erectile function (EF) domain score of the International Index of Erectile Function (IIEF-EF); and QoL was assessed with the Urolifetrade mark QoL-9 questionnaire.

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In this multicenter, randomized, double-blind, placebo-controlled study, 354 patients received placebo or vardenafil (5-20 mg) for 12 weeks. Primary efficacy measures were diary responses to the Sexual Encounter Profile (SEP) questions 2 (vaginal insertion) and 3 (maintenance of erection). Additional efficacy measures included positive responses to the Global Assessment Question (GAQ).

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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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PubMed search utilizing the terms "phosphodiesterase type 5 inhibitor," PDE5 inhibitor,"sildenafil,"vardenafil," and "tadalafil." Articles were screened based on whether or not they addressed issues of routine dosing of PDE5I. Manuscripts on the newly approved daily dose tadalafil for erectile dysfunction (ED) were deferred for analysis in a separate manuscript in this series.

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There were statistically significant differences between groups only with regards to the vacuolar degeneration parameter and to the cleaved caspase-3 digital method.

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Based upon the well known protective effect of intracellular cyclic guanosine monophosphate (cGMP) accumulation, we tested the hypothesis that storage solution enriched with optimal concentration of the phosphodiestherase-5 inhibitor vardenafil could provide better protection of vascular grafts against reperfusion injury after long-term cold ischaemic storage.

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The contamination of wastewater and sewage sludge has been examined for three phosphodiesterase type V inhibitors sildenafil, vardenafil and tadalafil, active agents of Viagra, Levitra and Cialis, respectively. Sensitive quantification methods based on solid-phase extraction (SPE) and pressurized liquid extraction (PLE) followed by high performance liquid chromatography - tandem mass spectrometry (HPLC-MS/MS) have been developed to analyse these compounds in wastewater and sewage sludge. Effluent water of nine sewage treatment plants (STPs) has been analysed to assess the impact of the phosphodiesterase type V inhibitors on the environment. One municipal STP (Tarragona, Spain) has been thoroughly studied over the year 2008 (i) with respect to the distribution of these compounds among influent and sewage sludge and (ii) the elimination efficiency. The developed methods allowed quantification at trace concentrations. Sildenafil was present in all investigated samples at the low ng/L and ng/g range, respectively. Tadalafil was not detected or below the limit of detection (LOQ) in effluent water taken in Spain but in sewage sludge (12 ng/g - < LOQ). Vardenafil was present only in one sludge sample and between 5 ng/g and < LOQ in effluent water. The overall removal efficiency of the STP in Tarragona (Spain) is 68%, 69% and 80% for sildenafil, tadalafil and vardenafil, respectively. This study shows for the first time the determination of these compounds in wastewater and sewage sludge.

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In vitro treatment with tadalafil or vardenafil on hBPH reduced IL-8 secretion induced by either TNFα or metabolic factors, including oxidized low-density lipoprotein, oxLDL, to the same extent as a PDE5-insensitive PKG agonist Sp-8-Br-PET-cGMP. These effects were reverted by the PKG inhibitor KT5823, suggesting a cGMP/PKG-dependency. Treatment with tadalafil or vardenafil significantly suppressed oxLDL receptor (LOX-1) expression. Histological evaluation of anti-CD45 staining (CD45 score) in prostatectomy specimens of BPH patients showed a positive association with MetS severity. Reduced HDL-cholesterol and elevated triglycerides were the only MetS factors significantly associated with CD45 score. In the MetS cohort there was a significant lower CD45 score in the vardenafil-arm versus the placebo-one.

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Erectile dysfunction (ED) is strongly linked to cardiovascular disease (CVD), especially in diabetics. ED is associated with deleterious changes in the overall vasculature and is recognized as an indicator of higher risk for adverse cardiovascular events. Endothelial dysfunction, vascular smooth muscle changes and increased fibrosis are indicated as major players in both ED and CVD. ED in diabetics is more refractory to acute treatment with phosphodiesterase-5 (PDE5) inhibitors (Viagra, Cialis, Levitra, Zydena) than in non-diabetics, but recent studies indicate that chronic administration of these drugs improves endothelial function, preserves vascular smooth muscle and decreases fibrotic changes. Use of PDE5 inhibitors in pre-diabetic and diabetic men may protect cardiovascular health, including vascular function in penile tissues.

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To assess the efficacy and tolerability of vardenafil in men with erectile dysfunction (ED) due to traumatic spinal cord injury (SCI).

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To determine whether a causative relationship exists between non-arteritic anterior ischemic optic neuropathy (NAION) and the use of phosphodiesterase-5 (PDE-5) inhibitors for the treatment of erectile dysfunction.

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The molecular bases for phosphodiesterase 5 (PDE5) catalytic-site affinity for cyclic guanosine monophosphate (cGMP) and potency of inhibitors are poorly understood. Cocrystal structures of PDE5 catalytic (C) domain with inhibitors reveal a hydrogen bond and hydrophobic interactions with Tyr-612, hydrogen bonds with Gln-817, a hydrophobic clamp formed by Phe-820 and Val-782, and contacts with His-613, Leu-765, and Phe-786 [Sung et al. (2003) Nature 425, 98-102; Huai et al. (2004) J. Biol. Chem. 279, 13095-13101]. Present results of point mutations of full-length PDE5 showed that maximum catalysis was decreased 2650-fold in H613A and 55-fold in F820A. Catalytic-site affinities for cGMP, vardenafil, sildenafil, tadalafil, or 3-isobutyl-1-methylxanthine (IBMX) were respectively weakened 14-, 123-, 30-, 51-, and 43-fold for Y612A; 63-, 511-, 43-, 95- and 61-fold for Q817A; and 59-, 448-, 71-, 137-, and 93-fold for F820A. The data indicate that these three amino acids are major determinants of affinity for cGMP and potency of selective and nonselective inhibitors, and that higher vardenafil potency over sildenafil and tadalafil results from stronger contacts with Tyr-612, Gln-817, and Phe-820. Affinity of V782A for cGMP, vardenafil, sildenafil, tadalafil, or IBMX was reduced 5.5-, 23-, 10-, 3-, and 12-fold, respectively. Change in affinity for cGMP, vardenafil, sildenafil, or IBMX in Y612F, H613A, L765A, or F786A was less, but affinity of H613A or F786A for tadalafil was weakened 37- and 17-fold, respectively. The results quantify the role of PDE5 catalytic-site residues for cGMP and inhibitors, indicate that Tyr-612, Gln-817, and Phe-820 are the most important cGMP or inhibitor contacts studied, and identify residues that contribute to selectivity among different classes of inhibitors.

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We retrospectively analyzed the effects on the erectile function (EF) of no treatment (NT), and an oral therapy (OT; on-demand therapy (OD) or a regimented rehabilitation (RR) program with phosphodiesterase type 5 inhibitors (PDE5-Is)), in a cohort of 196 consecutive patients following nerve-sparing radical retropubic prostatectomy (NSRRP). Patients undergoing bilateral NSRRP (BP; n = 147) and unilateral NSRRP (UP; n = 49), chose between OT (PDE5-Is OD or RR program) and NT. Patients who chose OD therapy received PDE5-Is (100 mg sildenafil, 20 mg tadalafil and vardenafil), whereas patients who chose the RR program received 100 mg sildenafil or 20 mg vardenafil three times a week, or 20 mg tadalafil twice a week at bedtime. The t-test for unpaired data and Fisher test were used for univariate analyses, logistic regression multivariate analysis was used to test the accuracy of available variables to predict EF recovery after radical prostatectomy. Potency rates were significantly correlated with the surgical technique and with OT when compared to NT (P < 0.02), respectively 68.7% for BP (61% with no therapy and 71% with PDE5-Is) and 44% for UP (29% with no therapy and 51% with PDE5-Is), while no statistically significative differences were found between OD and rehabilitation protocols (72% with rehabilitation and 70% with OD therapy in BP, 52% with rehabilitation and 50% with OD therapy in UP; P = NS). Early OT with PDE5-Is (OD or RR program) was superior to NT in recovery of EF in NSRRP. Furthermore, an RR program with PDE5-Is did not appear to be superior to OD therapy.

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The type-5 PDE inhibitor vardenafil reduces myocardial infarct size in situ, following ischemia/reperfusion, when applied at reperfusion in animal models. Little is known about the underlying protective signaling. Here, we test whether vardenafil is protective in rat isolated hearts and in a cell model of calcium stress.

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Of the intent to treat population 70% had severe ED (erectile function less than 11) at baseline. After 12 weeks both vardenafil doses were significantly superior to placebo (p <0.0001) for all efficacy variables. Improved erections (based on GAQ) were reported by 65.2% and 59.4% of patients on 20 and 10 mg vardenafil, respectively, and by only 12.5% of patients on placebo (p <0.0001). Among men with bilateral neurovascular bundle sparing, positive GAQ responses were reported by 71.1% and 59.7% of patients on 20 and 10 mg vardenafil, respectively, versus 11.5% of those on placebo (p <0.0001). The average intercourse success rate per patient receiving 20 mg vardenafil was 74% in men with mild to moderate ED and 28% in men with severe ED, compared to 49% and 4% for placebo, respectively. Few adverse events were observed. They were generally mild to moderate headache, flushing and rhinitis.

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The NO--cGMP system plays a key role in the regulation of sinusoidal tonus and liver blood flow with phosphodiesterase-5 (PDE-5) terminating the dilatory action of cGMP. We, therefore, investigated the effects of PDE-5 inhibitors on hepatic and systemic hemodynamics in rats.

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Primary outcome measure 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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The Real-Life Safety and Efficacy of vardenafil study is an international, open-label, prospective, noncomparative, noninterventional study in men with erectile dysfunction (ED).

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Utilization rates and preferences for PDEi's by brand.

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At baseline, the intention-to-treat population had moderate ED (International Index of Erectile Function-Erectile Function domain score of 13). For SEP-2 (penetration), the first-attempt and subsequent success rate was 44% and 74% for placebo, 71% and 81% for vardenafil 5 mg, 76% and 86% for vardenafil 10 mg, and 76% and 91% for vardenafil 20 mg, respectively. For SEP-3 (maintenance), first-attempt and subsequent success rate was 25% and 56% for placebo, 51% and 76% for vardenafil 5 mg, 65% and 76% for vardenafil 10 mg, and 59% and 84% for vardenafil 20 mg, respectively. For overall satisfaction with the sexual experience, the first-attempt and subsequent success rate was 19% and 48% for placebo, 48% and 68% for vardenafil 5 mg, 57% and 72% for vardenafil 10 mg, and 56% and 79% for vardenafil 20 mg, respectively. The reliability of vardenafil was similar or slightly greater in sildenafil-naive subjects compared with prior sildenafil responders. The most common adverse events were mild-to-moderate headache, flushing, and rhinitis.

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levitra tab 20mg 2015-06-03

The results suggest that PDE5i may increase sexual arousal by acting in the central nervous system. This effect may be mediated (at least in buy levitra part) by the activation of mesolimbic dopaminergic neurons.

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A series of drug-like compounds derived from Sildenafil, Vardenafil and Tadalafil analogues were modelled through the MIA-QSAR (multivariate image analysis applied to quantitative structure-activity relationships) ligand-based approach. A highly predictive model was achieved and novel compounds, miscellany of substructures of these three representative phosphodiesterase type-5 (PDE-5) inhibitors were predicted using the calibration parameters obtained through partial least squares (PLS) regression. The high bioactivities of buy levitra eight promising compounds were corroborated by docking evaluation. Calculated ADME-Tox (absorption, distribution, metabolism, excretion and toxicity) profiles for such compounds suggest advantages of some of them over the currently available, most common drugs used for the treatment of erectile dysfunction.

levitra generic prices 2016-02-23

Reliable efficacy is very important to continuing treatment for patients with erectile dysfunction. Vardenafil is a potent, buy levitra highly selective phosphodiesterase 5 (PDE5) inhibitor. The efficacy and safety of vardenafil has been confirmed in many clinical studies. This paper analyzed the efficacy reliability of vardenafil in clinical trials and real-life practice, concluded that it provided reliable efficacy for key parameters of erection and improved treatment compliance.

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Phosphodiesterase enzymes convert cyclic GMP and cyclic AMP to the corresponding nucleotide monophosphates. Phosphodiesterase 5 (PDE5) inhibition buy levitra is now a widely accepted and efficacious therapeutic option for the treatment of erectile dysfunction in men, as a result of extensive clinical experience with sildenafil and other new PDE5 inhibitors. Research in the field continues at a substantial level to identify new, selective PDE5 inhibitors and to investigate their usefulness and activity in other areas. This review summarizes recent clinical trials with PDE5 inhibitors, advances in medicinal chemistry, and other activities and potential applications of this class of compounds.

levitra dosage 2017-04-27

There are no interventional studies on the impact of sexual distress (SD) in men with obesity. We investigated the effects of vardenafil (VAR) on SD in middle-aged (mean age 49 ± 8), healthy, obese men in the absence of premature ejaculation, ED or hypogonadism. After a 4-week run-in period, 20 men with high body mass index (BMI=40 ± 8) and SD at the Sexual Distress Esteem Questionnaire-Male (mean score 65 ± 20 AU) were randomized to receive either VAR 10 mg on demand (N=10) or matched-placebo (PLB, N=10). Primary endpoints were variations from baseline in the intravaginal ejaculatory latency time (IELT) measured by the stopwatch technique; secondary endpoints were variations from baseline in Self-Esteem and Relationship (SEAR) and Male Sexual Health Questionnaire-Ejaculatory domain (MSHQ-EjD) scores. VAR significantly improved IELT (P<0.0001), as well as SEAR (P<0.001) and MSHQ-EjD (P<0.005) scores, whereas no changes were observed after PLB. Interestingly, an inverse relationship between BMI and IELT was found in all the men studied (r(2)=0.37, P<0.001). SD in healthy obese men seems to be correlated mainly with inadequate ejaculatory control, especially in men with higher BMI buy levitra . Our preliminary results suggest that treatment with VAR may improve ejaculatory control, thus ameliorating self-esteem and sexual performance in men with obesity.

levitra and alcohol 2016-04-21

There is evidence that LUTS and ED are strongly linked. This analysis of the regulatory basis of PDE5 biology could indicate several directions of investigation. However, it is necessary to devise well-designed large prospective studies that would produce significant data before this approach becomes a standard buy levitra of care.

levitra 12 mg 2016-05-28

Extensive PubMed literature search reviewing relevant buy levitra data on effects and mechanisms of PDE5 inhibitors on the cardiovascular system.

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Sufficient evidence exists that PDE-5 inhibitors buy levitra form a care that improves erectile dysfunction in diabetic men.

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Approximately two-thirds of PDE5I-naïve, Latin American men with ED were persistent and adherent after 6 months of therapy. buy levitra Factors like education level, ED severity, and ED duration were associated with persistence and adherence; additional study is warranted to investigate the predictive value of these factors.

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Mean age of patients was 54 ± 9.6 years. Compared with pretreatment, no significant improvement in BMI was observed. Serum total testosterone and free testosterone were significantly increased at 12 weeks and were maintained until 24 weeks (P < 0.001). TU significantly decreased cholesterol (P < 0.0001). TU significantly improved total IIEF, all five domain scores of IIEF (P < 0.0001) and total AMS, all three domain scores of AMS (P < 0.0001). On GEQ, TU improved erectile function in 76.9% of subjects. On safety buy levitra profile, TU significantly elevated Hb, Hct, and PSA at 24 weeks but within normal range. No serious adverse reactions were observed. Drop-out rate was 15.0%.

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To evaluate in vivo the therapeutic efficacy of clinical doses of sildenafil and vardenafil, two clinically approved phosphodiesterase 5 inhibitors, for activating ion transport in cystic buy levitra fibrosis.

levitra normal dosage 2017-06-21

New analogues of vardenafil and sildenafil illegally added to dietary supplements were detected by high-performance liquid chromatography (HPLC) analysis with a photodiode array detector (PDA). These compounds were isolated and their structures elucidated by mass buy levitra spectrometry (MS), infrared (IR) spectroscopy, one- and two-dimensional nuclear magnetic resonance (NMR). One of the new analogues given the trivial name pseudovardenafil (compound 1) was structurally elucidated and shown to be 1-[[3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]-piperidine. It was a vardenafil analogue isolated from a dietary supplement capsule. Compared with vardenafil, the piperidine ring was substituted for the ethylpiperazine group. The second new analogue, trivially named hydroxyhongdenafil (compound 2), was separated from bulk powder used as a raw material for a dietary supplement. The piperazine and phenyl groups were connected through an acetyl group instead of a sulfonyl group, and hydroxyethylpiperazine was substituted for the methylpiperazine of sildenafil. It was structurally elucidated as 5-[2-ethoxy-5-[[4-(2-hydroxyethyl)-1-piperazinyl]acetyl]phenyl]-1,4-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one.

generic levitra 60mg 2016-05-31

Erectile function was assessed by changes in intracavernous pressure (ICP). Smooth muscle (SM)/collagen ratios in corpus cavernosum were analyzed by Masson trichrome staining. Transforming growth factor-β1 (TGF-β1 ) mRNA and protein levels in corpus cavernosum (CC) were, respectively, evaluated by real-time polymerase chain reaction ( buy levitra PCR) analysis and Western blotting analysis.

levitra online prescription 2015-04-02

Current warnings regarding the risk of hearing loss related to PDE-5i use seems to be justified. However, the cross-sectional nature of the current study provides only limited insight regarding this relationship, and thus additional buy levitra research is warranted.

levitra drug 2015-04-03

To evaluate the acute haemodynamic effects of a single oral dose of vardenafil and to study the drug Imdur 240 Mg concentration in relation to haemodynamic effects in patients with pulmonary hypertension (PH).

levitra overdose 2017-03-15

In all SCI rats, BANF was already present and regular at resting conditions (26.2±4.1 spikes per second). During bladder filling, intravesical pressure (IVP) slowly increased with transient NVCs superimposed. Concomitantly, BANF progressively increased up to 2.4-fold at maximal BFV (2.08±0.24 ml). After stabilization at submaximal BFV, BANF was increased by 186±37%. Vardenafil injection induced an immediate decrease in NVCs compared to saline (p<0.001) and BANF (52 Cleocin Alcohol % decrease vs 28% in saline after 45 min; p<0.001).

levitra 80 mg 2015-04-04

Patients received Cardura Overdose Symptoms placebo, nightly vardenafil, or on demand vardenafil.

levitra generic cost 2016-06-03

Chronic vardenafil administration ameliorates impairment of penile hemodynamics and Trandate Tabs maintains normal SM to collagen ratio in cavernous tissues after acute arterial injury in rats.

levitra tablets 2017-07-04

Most patients, regardless of what PDE5 inhibitor they were prescribed at baseline, continued on that same PDE5 inhibitor throughout the study. Continuation rates were approximately 89% in the tadalafil cohort, vs. 63-64% in the sildenafil and vardenafil cohorts. The variables most strongly associated with increased risk of switching were prescription of sildenafil or vardenafil, vs. tadalafil, at baseline (odds ratios 4.43 and 4.14 respectively; p < 0.0001). Of patients who switched from tadalafil to another treatment, nearly 25% had switched back to tadalafil by study end. In Allegra Tablet Uses contrast, of patients who switched from sildenafil or vardenafil, < 10% from each cohort had switched back to their original treatment by study end.

levitra name brand 2016-04-15

A total of 30,010 men were included in the safety/intent-to-treat (S/ITT) analysis, with 26,043 men in the adjusted S/ITT population. Vardenafil improved erectile function in 78% of men, with 75% rating overall efficacy as "satisfying" or "very satisfying." The overall rates of successful penetration and maintenance with vardenafil following the first dose were 78% and 68%, respectively. For men with mild and moderate ED, first-dose Allegra 30 Mg success rates for penetration were 89% and 82%, respectively, and for maintenance, 82% and 71%, respectively. First-dose penetration and maintenance of erection rates were 76% and 66%, respectively, for men with self-reported hypertension, and 70% and 60%, respectively, for men with diabetes mellitus. At study end, 67% of patients preferred to continue using vardenafil. The most frequently reported AEs were headache (4%) and flushing (2%). Vardenafil was well tolerated, with a "satisfied/very satisfied" tolerability rating in 75% of cases as assessed by the physician.

levitra 5mg tablets 2015-03-16

The simple algorithms prepared should be a useful tool to be used Starlix 120 Mg in daily practice, which may help in choosing the right treatment for each subject affected by ED.

levitra 20mg cost 2016-10-07

Trials have demonstrated that the PDE5Is are excellent drugs with a great specificity of action and an almost perfect tolerance profile. Some instruments for comparison of clinical efficacy have to be considered subjective (psychometry, patient's preference, changes in quality of general, or sexual life). Some others are more objective (hardness, hormonal levels, and local circulation). An evidence-based comparison of the three PDE5Is should in the future be rooted in both subjective and objective methods. This will be of paramount importance in the drug trial design of new, forthcoming PDE5Is.

vardenafil generic levitra 2017-04-21

Erectile dysfunction is usually of vascular origin and is frequently encountered in men with cardiovascular disease. The introduction of phosphodiesterase-5 inhibitors has revolutionized the management of patients with erectile dysfunction. Currently available phosphodiesterase-5 inhibitors have distinct pharmacokinetic and pharmacodynamic properties, thus permitting for tailoring sexual therapy according to patient characteristics and needs. Phosphodiesterase-5 inhibitors possess vasorelaxing properties and exert systemic hemodynamic effects, which need to be taken into account when other cardiovascular drugs are co-administered. Special caution is needed with alpha-blockers, while the co-administration with nitrates is contra-indicated due to the risk of life-threatening hypotension. This review presents the advent of sexual therapy, describes the mechanism of action and the specific characteristics of commercially available phosphodiesterase-5 inhibitors, summarizes the efficacy and safety of these drugs with special emphasis on the cardiovascular system, and discusses the clinical criteria used for the selection of each drug for the individual patient.

levitra recommended dosage 2017-11-10

Vardenafil is a safe and effective oral agent for the treatment of ED. Its greater potency and PDE5 selectivity compared with sildenafil appear to confer a lower risk of vision-related adverse effects, but other clinical consequences of these differences are currently unclear.

levitra reviews 2012 2017-05-17

Vardenafil is a highly selective phosphodiesterase type-5 inhibitor for the treatment of erectile dysfunction (ED). Efficacy of vardenafil has been demonstrated in various ED populations, but that in Japanese patients with spinal cord injury (SCI) has not been assessed.

levitra pills 2016-03-17

To investigate the effect of vardenafil in kidney of rats submitted to acute ischemia and reperfusion.

levitra mail order 2017-09-17

To evaluate the efficacy, safety, and tolerability of vardenafil in men with moderate to severe ED of broad etiology.

levitra generic canada 2017-08-02

The incidence of erectile dysfunction (ED) in patients undergoing pelvic urologic surgery, the efficacy and tolerability of vardenafil-based rehabilitative treatment as first option in these patients, the role of spontaneous erection (SE) as a possible positive predictive factor to erection recovery after such treatment, and the role of second-line therapies in those nonresponders are evaluated. All the patients undergoing pelvic urologic surgery at our Institution between November 2002 and December 2003 were considered. Preoperative erectile function (EF) was evaluated by using the abridged five-item version of the International Index of Erectile Function (IIEF5) questionnaire. Study population was divided into separate groups considering grade of preoperative EF, nerve sparing (NS) surgery and type of procedure (radical prostatectomy, radical cystectomy (RC) or nerve and seminal sparing cystectomy). In total, 86 patients were evaluated. After 6 months, an increase in mean IIEF5 score of 12.9 points was found in those who had undergone a bilateral NSRP after vardenafil therapy, of 8.0 points in those who had undergone unilateral NSRP, of 11.3 in those who had undergone NSRC and of 11.5 in nerve and seminal sparing cistectomies. A better vardenafil response was found in patients with SE+(P<0.001). Among those vardenafil notresponders, 13 were treated by using intracavernous injections, one by vacuum device and three with penile prosthesis implant. In conclusion, in our experience, vardenafil showed to be well tolerated and effective for recovery of EF in patients undergoing pelvic urologic surgery. This drug was particularly effective for those with a normal preoperative EF undergoing an NS procedure. Of course, it should be recognized that the absence of a control group in the study represents an important limitation. However, based on the data from the literature, there is a strong belief that such an approach will lead to an earlier recovery of EF than without rehabilitative treatment.

levitra cost 2016-07-06

To evaluate the efficacy of vardenafil in patients previously unresponsive to sildenafil.