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Erectile Dysfunction Treatment and Causes Better Sex Naturally Indian Herbal Remedies: Viritenz Vs Viagra Magnum XXL Basakojų takas. The Effect of Sildenafil and Tadalafil on Skeletal Muscle and Perceptual Fatigue. The safety and scientific validity of this study is the responsibility of the study sponsor and investigators.

Listing a study does not mean it has been evaluated by the U.S.

Study Details Tabular View Study Results Disclaimer How to Read a Study Record. Condition or disease Intervention/treatment Phase Fatigue Drug: Sildenafil Drug: tadalafil Drug: Placebo Not Applicable.

Subjects were assigned to one of 4 arms: Choosing to participate in a study is an important personal decision.

Talk with your doctor and family members or friends about deciding to join a study.

To learn more about this


, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information Ages Eligible for Study: 50 Years to 60 Years (Adult) Sexes Eligible for Study: All Accepts Healthy Volunteers: Yes.

Age 50-60 years of age Ability to sign consent form (score>23 on the 30-item Mini Mental Status examination, MMSE) Stable body weight for at least three months. Physical dependence or frailty (impairment in any of the Activities of Daily Living (ADL), history of falls (>2/year) or significant weight loss in the past year).

Pregnancy Significant heart, liver, kidney, blood or respiratory disease. Diabetes mellitus or other untreated endocrine disease. Recent (within 6 months) treatment with anabolic steroids, or corticosteroids. Severe depression (>5 on the 15-item Geriatric Depression Scale, GDS).

Cardiac abnormalities such as cardiac shunt or previously diagnosed pulmonary hypertension.

Systolic blood pressure 150, diastolic blood pressure . This range is smaller than the acceptable range stated in the prescribing information for sildenafil/tadalafil (90/50 and. To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor. WikiDoc is not a professional health care provider, nor is it a suitable replacement for a licensed healthcare provider. WikiDoc is intended to be an educational tool, not a tool for any form of healthcare delivery. The educational content on WikiDoc drug pages is based upon the FDA package insert, National Library of Medicine content and practice guidelines / consensus statements.

WikiDoc does not promote the administration of any medication or device that is not consistent with its labeling. Sildenafil is a Phosphodiesterase 5 Inhibitor that is FDA approved for the treatment of pulmonary arterial hypertension. Common adverse reactions include erythema,flushing, indigestion, headache, insomnia, visual disturbance, epistaxis, nasal congestion and rhinitis.

FDA-Labeled Indications and Dosage (Adult) Pulmonary arterial hypertension (WHO Group I) Indication Sildenafil tablets are indicated for the treatment of pulmonary arterial hypertension (WHO Group I) in adults to improve exercise ability and delay clinical worsening. The delay in clinical worsening was demonstrated when cvs pharmacy sildenafil price sildenafil tablets were added to background epoprostenol therapy.

Studies establishing effectiveness were short-term (12 to 16 weeks), and included predominately patients with New York Heart Association (NYHA) Functional Class II-III symptoms and idiopathic etiology (71%) or associated with connective tissue disease (CTD) (25%). Limitation of Use Adding sildenafil to bosentan therapy does not result in any beneficial effect on exercise capacity.

Dosing information Recommended dosage: 20 mg PO tid. Administer sildenafil tablet doses 4 to 6 hours apart.

In the clinical trial no greater efficacy was achieved with the use of higher doses.

Treatment with doses higher than 20 mg TID is not recommended.

Off-Label Use and Dosage (Adult) Guideline-Supported Use.

There is limited information regarding Off-Label Guideline-Supported Use of Sildenafil in adult patients. Dosing information 50 mg/day [1] Sexual dysfunction. Dosing information 50 mg/day [2] Drug-induced impotence. Dosing information 25 mg/day or 50 mg/day [3] Drug withdrawal, Nitric oxide. Dosing information 50 mg/day [4]


sexual arousal disorder.

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Dosing information sildenafil 50 mg twice a day to 200 mg once a day [12] Pediatric Indications and Dosage.

FDA-Labeled Indications and Dosage (Pediatric) FDA Package Insert for Sildenafil contains no information regarding FDA-labeled indications and dosage information for children.

Off-Label Use and Dosage (Pediatric) Guideline-Supported Use. There is limited information regarding Off-Label Guideline-Supported Use of Sildenafil in pediatric patients.

Dosing information Not applicable [13] Contraindications. Sildenafil tablets


contraindicated in patients with :



of organic nitrates in any form, either regularly or intermittently, because of the greater risk of hypotension. Known hypersensitivity to sildenafil or any component of the tablet. Hypersensitivity, including anaphylactic reaction, anaphylactic shock and anaphylactoid reaction, has been reported in association with the use of sildenafil. In a long-term trial in pediatric patients with PAH, an increase in mortality with increasing sildenafil citrate dose was observed.

Deaths were first observed after about 1 year and causes of death were typical of patients with PAH.

Use of sildenafil citrate, particularly chronic use, is not recommended in children. Sildenafil citrate has vasodilatory properties, resulting in mild and transient decreases in blood pressure.

Before prescribing sildenafil citrate, carefully consider whether patients with certain underlying conditions could be adversely affected by such vasodilatory effects (e.g., patients on antihypertensive therapy or with resting hypotension [BP less than 90/50], fluid depletion, severe left ventricular outflow obstruction, or autonomic dysfunction).

Monitor blood pressure when co-administering blood pressure lowering drugs with sildenafil citrate. Pulmonary vasodilators may significantly worsen the


status of patients with pulmonary veno-occlusive disease (PVOD).

Since there are no clinical data on administration of sildenafil citrate to patients with veno-occlusive disease, administration of sildenafil citrate to such patients is not recommended.

Should signs of pulmonary edema occur when sildenafil citrate is administered, consider the possibility of associated PVOD. The incidence of epistaxis was 13% in patients taking sildenafil citrate with PAH secondary to CTD.

This effect was not seen in idiopathic PAH (sildenafil citrate 3%,


2%) patients.

The incidence of epistaxis was also


in sildenafil citrate-treated patients with a concomitant oral vitamin K antagonist (9% versus 2% in those not treated with concomitant vitamin K antagonist). The safety of sildenafil citrate is unknown in patients with bleeding disorders or active peptic ulceration.

When used to treat erectile dysfunction, non-arteritic anterior ischemic optic neuropathy (NAION), a cause of decreased vision including permanent loss of vision, has been reported postmarketing in temporal association with the use of phosphodiesterase type 5 (PDE-5) inhibitors, including sildenafil.

Most, but not all, of these patients


underlying anatomic or vascular risk factors for developing NAION, including but not necessarily limited to: low cup to disc ratio (crowded disc), age over 50, diabetes, hypertension, coronary artery disease, hyperlipidemia and smoking. Based on published literature, the annual incidence of NAION is 2.5-11.8 cases per 100,000 males aged ? 50 per year in the general population.

An observational study evaluated whether recent, episodic use of PDE5 inhibitors (as a class), typical of erectile dysfunction treatment, was associated with acute onset of NAION.

The results suggest an approximately 2-fold increase in the risk of NAION within 5 half-lives of PDE5 inhibitor use.

It is not possible to determine whether these events are related directly to the use of PDE-5 inhibitors, to the patients underlying vascular risk factors or anatomical defects, to a combination of these factors, or to other factors.

Advise patients to seek immediate medical attention in


event of a sudden loss of vision in one or both eyes while taking PDE-5 inhibitors, including sildenafil



Physicians should also discuss the increased risk of NAION with patients who have already experienced NAION in one eye, including whether such individuals could be adversely affected by use of vasodilators, such as PDE-5 inhibitors. There are no controlled clinical data on the safety or efficacy of sildenafil citrate in patients with retinitis pigmentosa, a minority whom have genetic disorders of retinal phosphodiesterases.

Prescribe sildenafil citrate with caution in these patients.

Cases of sudden decrease or loss of hearing, which may be accompanied by tinnitus and dizziness, have been reported in temporal association with the use of PDE-5 inhibitors, including sildenafil citrate. In some of the cases, medical


and other factors were reported that may have played a role. In many cases, medical follow-up information was limited. It is not possible to determine whether these reported events are related directly to the use of sildenafil citrate, to the patients underlying risk factors for hearing loss, a combination of these factors, or to other factors. Advise patients to seek prompt medical attention in the event of sudden decrease or loss of hearing while taking PDE-5 inhibitors, including sildenafil citrate.

Sildenafil is also marketed as Sildenafil citrate.

The safety and efficacy of combinations of sildenafil citrate with Sildenafil citrate or other PDE-5 inhibitors have not been studied.

Inform patients taking sildenafil citrate not to take Sildenafil citrate or other PDE5 inhibitors.

Use sildenafil citrate with caution in patients with anatomical deformation of the penis (e.g., angulation, cavernosal fibrosis, or Peyronies disease) or in patients who have conditions, which may predispose them to priapism (e.g., sickle cell anemia, multiple myeloma, or leukemia). In the event of an erection that persists


than 4 hours, the patient should seek immediate medical assistance.

If priapism (painful erection greater than 6 hours in duration) is not treated immediately, penile tissue damage and permanent loss of potency could result.

Vaso-occlusive Crisis in Patients with Pulmonary Hypertension Secondary to Sickle Cell Anemia.

In a small, prematurely terminated study of patients with pulmonary hypertension (PH) secondary to sickle cell disease, vaso-occlusive crises requiring hospitalization were more commonly reported by patients who received sildenafil citrate than by those randomized to placebo.

The effectiveness and safety of sildenafil citrate in the treatment of PAH secondary to sickle cell anemia has not been established.

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Safety data of sildenafil citrate in adults were obtained from the 12-week, placebo-controlled clinical study (Study 1) and an open-label extension study in 277 sildenafil citrate-treated patients with PAH, WHO Group I Diagnostic Classification.

The overall frequency of discontinuation in sildenafil citrate-treated patients 20 mg TID was 3% and was the same for the placebo group. In Study 1, the adverse reactions that were reported by at least 3% of sildenafil citrate-treated patients (20 mg TID) and were more frequent in sildenafil citrate-treated patients than in placebo-treated patients are


in Table 1.

Adverse reactions were generally transient and mild to moderate in nature.

At doses higher than the recommended 20 mg TID, there was a greater incidence of some adverse reactions including flushing, diarrhea,


and visual disturbances.

Visual disturbances were identified as mild and transient, and were predominately color-tinge to vision, but also increased sensitivity to light or blurred vision.

The incidence of retinal hemorrhage with sildenafil citrate 20 mg TID was 1.4% versus 0% placebo and for all sildenafil citrate doses studied was 1.9% versus 0% placebo. The incidence of eye hemorrhage at both 20 mg TID and at all doses studied was 1.4% for sildenafil citrate versus 1.4% for placebo.

The patients experiencing these reactions had risk factors for hemorrhage including concurrent anticoagulant therapy. In a placebo-controlled fixed dose titration study (Study 2) of sildenafil citrate (starting with recommended dose of 20 mg TID and increased to 40 mg TID and then 80 mg TID) as an adjunct to intravenous epoprostenol in patients with PAH, the adverse reactions that were more frequent in the sildenafil citrate + epoprostenol group than in the epoprostenol group (greater than 6% difference) are shown in Table 2 .

The following adverse reactions have been identified during post approval use of * Sildenafil (marketed for both PAH and erectile dysfunction).

Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. In postmarketing experience with sildenafil at doses indicated for erectile dysfunction, serious cardiovascular, cerebrovascular, and vascular events, including myocardial infarction, sudden cardiac death, ventricular arrhythmia, cerebrovascular hemorrhage, transient ischemic attack, hypertension, pulmonary hemorrhage, and subarachnoid and intracerebral hemorrhages have been reported in temporal association with the use of the drug.

Most, but not all, of these patients had preexisting cardiovascular risk factors. Many of these events were reported to occur during or shortly after sexual activity, and a few were reported to occur shortly after the use of sildenafil without sexual activity.

Others were reported to have occurred hours to days after use concurrent with sexual activity.

It is not possible to determine whether these events are related directly to sildenafil, to sexual activity, to the patients underlying cardiovascular disease, or to a combination of these or other factors. Concomitant use of sildenafil citrate with nitrates in any form is contraindicated. Concomitant use of sildenafil citrate with ritonavir and other potent CYP3A inhibitors is not recommended. In drug-drug interaction studies, sildenafil (25 mg, 50 mg, or 100 mg) and the alpha-blocker doxazosin (4 mg or 8 mg) were administered simultaneously to patients with benign prostatic hyperplasia (BPH) stabilized on doxazosin therapy.

In these study populations, mean additional reductions of supine systolic and diastolic blood pressure of 7/7 mmHg, 9/5 mmHg, and 8/4 mmHg, respectively, were observed. Mean additional reductions of standing blood pressure of 6/6 mmHg, 11/4 mmHg, and 4/5 mmHg, respectively, were also observed. There were infrequent reports of patients who experienced symptomatic postural hypotension.

These reports included dizziness and light-headedness, but not syncope. When sildenafil 100 mg oral was co-administered with amlodipine, 5 mg or 10 mg oral, to hypertensive patients, the mean additional


on supine blood pressure was 8 mmHg sildenafil for sale online systolic and 7 mmHg diastolic.

Monitor blood pressure when co-administering blood pressure lowering drugs with sildenafil citrate. There are no adequate and well-controlled studies of sildenafil in pregnant women.

No evidence of teratogenicity, embryotoxicity, or fetotoxicity was observed in pregnant rats or rabbits dosed with sildenafil 200 mg/kg/day during organogenesis, a level that is, on a mg/m2 basis, 32- and 68-times, respectively, the recommended human dose (RHD) of 20 mg three times a day. In a rat pre- and postnatal development study, the no-observed-adverse-effect dose was 30 mg/kg/day (equivalent to 5-times the RHD on a mg/m2 basis).

Pregnancy Category (AUS): There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Sildenafil in women who are pregnant. The safety and efficacy of sildenafil citrate during labor and delivery has not been studied. It is not known if sildenafil or its metabolites are excreted in human breast milk. Because many


are excreted in human milk, caution should be exercised when sildenafil citrate is administered to a nursing woman.

In a randomized, double-blind, multi-center, placebo-controlled, parallel-group, dose-ranging study, 234 patients with PAH, aged 1 to 17 years, body weight greater than or equal to 8 kg, were randomized, on the basis of body weight, to three dose levels of sildenafil citrate, or placebo, for 16 weeks of treatment.

Most patients had mild to moderate symptoms at baseline: WHO Functional Class I (32%), II (51%), III (15%), or IV (0.4%).

One-third of patients had primary PAH; two-thirds had secondary PAH (systemic-to-pulmonary shunt in 37%; surgical repair in 30%).

The primary objective of the study was to assess the effect of sildenafil citrate on sildenafil for sale online exercise capacity as


by cardiopulmonary exercise testing in pediatric patients developmentally able to perform the test (n = 115).

Administration of sildenafil citrate did not result in a statistically significant improvement in exercise capacity in those patients.

No patients died during the 16-week controlled study.

After completing the 16-week controlled study, a patient originally randomized to sildenafil citrate remained on his/her dose of sildenafil citrate or, if originally randomized to placebo, was randomized to low-, medium-, or high-dose sildenafil citrate.

After all patients completed 16 weeks of follow-up in the controlled study, the blind was broken and doses were adjusted as clinically indicated. Patients treated with sildenafil were followed for a median of 4.6 years (range 2 days to 8.6 years).

Mortality during the long-term study, by originally assigned dose, is shown in Figure 6: During the study, there were 42 reported deaths with 37 of these deaths reported prior to a decision to titrate subjects to a lower dosage because of a finding of increased mortality with increasing sildenafil citrate doses.

For the survival analysis which included 37 deaths, the hazard ratio for high dose compared to low dose was 3.9, p=0.007.

Use of sildenafil citrate,


chronic sildenafil buy cheap use, is not recommended in children.

Clinical studies of sildenafil citrate did not include sufficient numbers of sildenafil generic cheap subjects aged 65 and over to determine whether they respond differently from younger subjects.

Other reported clinical experience has not identified differences in responses between the elderly and younger patients.

In general, dose selection for an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

There is no FDA guidance on the use of Sildenafil with respect to specific gender populations.

There is no FDA guidance on the use of Sildenafil with respect to specific racial populations. No dose adjustment is required (including severe impairment CLcr Hepatic Impairment. No dose adjustment for mild to moderate impairment is required.

There is no FDA guidance on the use of Sildenafil in women of reproductive potentials and males. There is no FDA guidance one the use of Sildenafil in patients who are immunocompromised. FDA Package Insert for Sildenafil contains no information regarding drug monitoring. There is limited information about the IV Compatibility.

In studies with healthy volunteers of single doses up to 800 mg, adverse events were similar to those seen at lower doses but rates and severities were increased. In cases of overdose, standard supportive measures should be adopted as required. Renal dialysis is not expected to accelerate clearance as sildenafil is highly bound to plasma proteins and it is not eliminated in the urine.

Sildenafil is an inhibitor of cGMP specific phosphodiesterase type-5 (PDE-5) in the smooth muscle of the pulmonary vasculature, where sildenafil for sale online PDE-5 is responsible for degradation of cGMP.

Sildenafil, therefore, increases cGMP within pulmonary vascular smooth muscle cells resulting in relaxation. In patients with PAH, this can lead to vasodilation of the pulmonary vascular bed and, to a lesser degree, vasodilatation in the systemic circulation. Studies in vitro have shown that sildenafil is selective for PDE-5. Its effect is more potent on PDE-5 than on other known phosphodiesterases (10-fold for PDE6, greater than 80-fold for PDE1, greater than 700-fold for PDE2, PDE3, PDE4, PDE7, PDE8, PDE9, PDE10, and PDE11).

The approximately 4,000-fold selectivity for PDE-5 versus PDE3 is important because PDE3 is involved in control of cardiac contractility.

Sildenafil is only about 10-fold as potent for PDE-5 compared to PDE6, an enzyme found in the retina and involved in the phototransduction pathway of the retina. This lower selectivity is thought to be the basis for abnormalities related to color vision observed with higher doses or plasma levels.

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