Clinical data

Cardiac studies. The use of Will Viagra Work For Erectile Dysfunction in doses up to 100 mg did not lead to clinically significant ECG changes in healthy volunteers. The maximum decrease in systolic pressure in the supine position after taking Herbal Viagra For Erectile Dysfunction at a dose of 100 mg was 8.3 mm Hg.art., and diastolic pressure — 5.3 mm Hg.a More pronounced, but also transient effect on blood PRESSURE was observed in patients taking nitrates (see "Contraindications" and "Interaction").

In a study of the hemodynamic effect of Sildenafil For Erectile Dysfunction Dosage in a single dose of 100 mg in 14 patients with severe coronary artery disease (more than 70% of patients had stenosis of at least one coronary artery), systolic and diastolic resting pressure decreased by 7 and 6%, respectively, and pulmonary systolic pressure decreased by 9%. Natural Viagra For Erectile Dysfunction did not affect cardiac output and did not interfere with blood flow in stenotic coronary arteries, and also led to an increase (by about 13%) of adenosine-induced coronary flow in both stenotic and intact coronary arteries. In a double-blind placebo-controlled study of 144 patients with erectile dysfunction and stable angina, taking antianginal drugs (except nitrates), exercise was performed until the severity of symptoms of angina increased. The duration of the exercise was significantly longer (19.9 seconds; 0.9–38.9 seconds) in patients taking Will Viagra Work For Erectile Dysfunction in a single dose of 100 mg, compared with patients receiving placebo.

In a randomized double-blind placebo-controlled study, the effect of changing the dose of Will Viagra Work For Erectile Dysfunction (up to 100 mg) in men (n=568) with erectile dysfunction and hypertension, taking more than two antihypertensive drugs, was studied. Will Viagra Work For Erectile Dysfunction improved erection in 71% of men compared to 18% in the placebo group. The frequency of adverse effects was comparable to that in other groups of patients, as well as in those taking more than three antihypertensive drugs.

Studies of visual impairment. In some patients, 1 h after taking Viagra And Other Erectile Dysfunction Drugs at a dose of 100 mg with the Farnsworth-Mansell test 100 revealed a slight and transient violation of the ability to distinguish shades of color (blue/green). After 2 hours after taking the drug, these changes were absent. It is believed that color vision impairment is caused by inhibition of PDE-6, which is involved in the process of color transmission in the retina. Will Viagra Work For Erectile Dysfunction had no effect on visual acuity, contrast perception, electroretinogram, IOP or pupil diameter.

Contraindications

hypersensitivity to Which Drug For Erectile Dysfunction Is Better Viagra Or Cialis or any other component of the drug;

application in patients receiving constantly or intermittently nitric oxide donators, organic nitrates or nitrites in any form, as Will Viagra Work For Erectile Dysfunction enhances the hypotensive effect of nitrates (see "Interaction»);

the combined use of inhibitors of PDE5, including Will Viagra Work For Erectile Dysfunction, called guanylate cyclase stimulants such as riociguat, because it can lead to symptomatic hypotension;

concomitant use with other agents for the treatment of erectile dysfunction (safety and efficacy of Will Viagra Work For Erectile Dysfunction when used together has not been studied (see. "Special instructions»);

lactose intolerance, lactase deficiency, glucose-papacosma malabsorption;

severe liver failure (class C classification for child-Pugh);

simultaneous administration of ritonavir;

severe cardiovascular diseases (severe heart failure, unstable angina, stroke or myocardial infarction during the last 6 months, life-threatening arrhythmias, hypertension (BP >170/100 mm Hg). art.) or hypotension (blood PRESSURE <90/50 mm Hg.art.) (see "Special instructions»);

patients with episodes of development partizanai anterior ischemic optic neuropathies (NESN) with loss of vision in one eye;

hereditary retinitis pigmentosa (see special instructions»);

according to the registered indication is not intended for use in women;

according to the registered indication is not intended for use in children under 18 years.

With caution: anatomic deformity of the penis (angulation, cavernous fibrosis or Peyronie's disease) (see "Special instructions"); diseases of, predisposing to the development of priapism (sickle-cell anemia, multiple myeloma, leukemia, thrombocythemia) (see "Special instructions"); diseases accompanied by haemorrhage; ulcer disease of stomach and duodenum in the acute phase; liver dysfunction; severe renal insufficiency (Cl creatinine <30 ml/min); patients with an episode of partizanai development of the anterior ischemic optic neuropathies in history (see "Special instructions); simultaneous reception of blockers α-adrenergic receptors.

Use during pregnancy and breast-feeding

According to the registered indication, the drug is not intended for use in women.

Cardiovascular complications

During the post-marketing use of Alternative To Viagra For Erectile Dysfunction for the treatment of erectile dysfunction, adverse events such as severe cardiovascular complications (including myocardial infarction, unstable angina, sudden cardiac death, ventricular arrhythmia, hemorrhagic stroke, transient ischemic attack, hypertension and hypotension) were reported, which had a temporary connection with the use of Uses For Viagra Other Than Erectile Dysfunction. Most of these patients, but not all of them, had risk factors for cardiovascular complications. Many of these adverse events were observed shortly after sexual activity, and some were observed after taking Natural Viagra For Erectile Dysfunction without subsequent sexual activity. It is not possible to establish a direct link between the reported adverse events and those or other factors.

Visual impairment

In rare cases, during post-approval use of all of the inhibitors of PDE5, including Viagra And Other Erectile Dysfunction Drugs, reported NESN is a rare disease and the cause of the decrease or loss of vision. Most of these patients had risk factors, such as decreased ratios of excavation diameter to optic disc (stagnant disc), age over 50, diabetes, hypertension, CHD, hyperlipidemia, and Smoking. In an observational study evaluated whether recent use of drugs class of inhibitors PDE-5 with an acute onset NESN. The results indicate approximately a 2-fold increase in risk of developing NESN within 5T1/2 after application of the PDE-5 inhibitor. According to published literature, the annual incidence of npins IS 2.5–11.8 cases per 100,000 men aged ≥50 years in the General population. Patients should be advised to stop Viagra Tablet For Erectile Dysfunction therapy in case of sudden loss of vision and consult a doctor immediately. Persons who have already had a case NESN have an increased risk of relapse NESN. Therefore, the doctor should discuss this risk with such patients, as well as the potential chance of adverse effects of PDE-5 inhibitors. PDE-5 inhibitors, including Viagra Cure Erectile Dysfunction, in such patients should be used with caution and only in situations where the expected benefit outweighs the risk.

When using the drug Will Viagra Work For Erectile Dysfunction in doses exceeding the recommended, adverse events were similar to those noted above, but usually more common.

*Side effects identified during post-marketing studies.

Interaction

Effect of other drugs on the pharmacokinetics of Is Viagra Only For Erectile Dysfunction

The metabolism of Which Drug For Erectile Dysfunction Is Better Viagra Or Cialis occurs mainly under the action of CYP3A4 isoenzyme (main pathway), so inhibitors of this isoenzyme can reduce the clearance of Generic Viagra For Erectile Dysfunction, and inducers, respectively, increase the clearance of Will Viagra Work For Erectile Dysfunction. A decrease in the clearance of Will Viagra Work For Erectile Dysfunction with simultaneous use of inhibitors of CYP3A4 isoenzyme (ketoconazole, erythromycin, cimetidine).

Cimetidine (800 mg), a nonspecific inhibitor of CYP3A4 isoenzyme, when taken together with Dose Of Viagra For Erectile Dysfunction (50 mg) causes an increase in the concentration of Will Viagra Work For Erectile Dysfunction in plasma by 56%.

A single dose of 100 mg of Will Viagra Work For Erectile Dysfunction together with erythromycin (500 mg/day 2 times a day for 5 days), a moderate inhibitor of CYP3A4 isoenzyme, while achieving a constant concentration of erythromycin in the blood, leads to an increase in the AUC of Viagra Without Erectile Dysfunction by 182%.

When co-administered Sildenafil For Erectile Dysfunction Dosage (once 100 mg) and saquinavir (1200 mg/day 3 times daily), an inhibitor of HIV protease and of CYP3A4, on the background to achieve a constant concentration of saquinavir in the blood, Cmax of Viagra And Other Erectile Dysfunction Drugs was increased by 140% and the AUC increased by 210%.

Stronger inhibitors of CYP3A4 isoenzyme, such as ketoconazole and Itraconazole, can cause more pronounced changes in the pharmacokinetics of Will Viagra Work For Erectile Dysfunction.

The simultaneous use of Will Viagra Work For Erectile Dysfunction (100 mg once) and ritonavir (500 mg 2 times a day), an inhibitor of HIV protease and a strong inhibitor of cytochrome P450, on the background to achieve a constant concentration of ritonavir in the blood leads to an increase in Cmax of Can Viagra Be Used For Erectile Dysfunction by 300% (4 times), a AUC by 1000% (11-fold). After 24 h, the concentration of Will Viagra Work For Erectile Dysfunction in blood plasma is about 200 ng/ml (after a single application of one Will Viagra Work For Erectile Dysfunction — 5 ng/ml). This is consistent with the ritonavir effect on a wide range of cytochrome P450 substrates. Will Viagra Work For Erectile Dysfunction does not affect the pharmacokinetics of ritonavir. Given these data, the simultaneous reception of ritonavir and Will Viagra Work For Erectile Dysfunction is not recommended. In any case, the maximum dose of Sildenafil For Erectile Dysfunction under any circumstances should not exceed 25 mg for 48 hours. If Will Viagra Work For Erectile Dysfunction is taken in the recommended doses, patients receiving strong inhibitors of CYP3A4 isoenzyme at the same time, then Cmax free Will Viagra Work For Erectile Dysfunction does not exceed 200 nm, and the drug is well tolerated.

Single administration of antacid (magnesium hydroxide/aluminum hydroxide) does not affect the bioavailability of Viagra Cure Erectile Dysfunction.

Studies involving healthy volunteers with simultaneous use of endothelin receptor antagonist, bosentan (CYP3A4 isoenzyme inducer (moderate), CYP2C9, and possibly CYP2C19) in Css (125 mg 2 times a day) and Will Viagra Work For Erectile Dysfunction in Css (80 mg 3 times a day) showed a decrease in AUC and Cmax Can Viagra Be Used For Erectile Dysfunction by 62.6 and 52.4%, respectively. Alternative To Viagra For Erectile Dysfunction increased the AUC and Cmax of bosentan by 49.8 and 42%, respectively.

It is assumed that the simultaneous use of Viagra Stress Erectile Dysfunction with powerful inducers of CYP3A4 isoenzyme, such as rifampicin, can lead to a greater decrease in the concentration of Will Viagra Work For Erectile Dysfunction in blood plasma.

CYP2D6 isoenzyme inhibitors (SSRIs, tricyclic antidepressants), thiazide and thiazide-like diuretics, ACE inhibitors and calcium antagonists have no effect on the pharmacokinetics of Viagra For Diabetes Erectile Dysfunction.

Azithromycin (500 mg/day for 3 days) has no effect on AUC, Cmax, Tmax, excretion rate constant and T1/2 Viagra For Non Erectile Dysfunction or its main circulating metabolite.

Will Viagra Work For Erectile Dysfunction is a potent selective inhibitor of cGMP-specific PDE-5.

Mechanism of action

The implementation of the physiological mechanism of erection is associated with the release of nitric oxide (NO) in the cavernous body during sexual stimulation. This, in turn, leads to an increase in the level of cGMP, the subsequent relaxation of smooth muscle tissue of the cavernous body and an increase in blood flow.

Is Viagra Good For Erectile Dysfunction does not have a direct relaxing effect on the isolated cavernous human body, but enhances the effect of nitric oxide by inhibiting PDE-5, which is responsible for the disintegration of cGMP.

Selective Natural Viagra For Erectile Dysfunction against PDE5 in vitro, its activity against PDE5 superior activity against other known PDE isoenzymes: PDE-6 — 10 times; PDE-1 more than 80 times; PDE-2, PDE-4, PDE-7 PDE–11 more than 700 times. Viagra Dose For Erectile Dysfunction is 4000 times more selective for PDE-5 than PDE-3, which is crucial because PDE-3 is one of the key enzymes in the regulation of myocardial contractility.

A prerequisite for the effectiveness of Viagra And Other Erectile Dysfunction Drugs is sexual stimulation.

Viagra For Erectile Dysfunction restores impaired erectile function in conditions of sexual stimulation by increasing blood flow to the cavernous bodies of the penis.

Viagra For Erectile Dysfunction