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Vega Extra Cobra (sildenafil citrate)

Vega Extra Cobra (sildenafil citrate)

$ 1.02 per pill

Quick Overview

Since the combined use of Cobra Vega Extra Strong 120mg and α-blockers can lead to symptomatic hypotension in some sensitive patients, Cobra Vega Extra Strong 120mg should be used with caution in patients taking α-blockers (see "Interaction"). To minimize the risk of postural hypotension in patients taking α-blockers, the drug Cobra Vega Extra Strong 120mg should be started only after achieving stabilization of hemodynamic parameters in these patients. It should also consider reducing the initial dose of Cobra Vega Extra Strong 120mg (see. "Dosage and administration"). The doctor should inform patients about what actions should be taken in case of symptoms of postural hypotension.

Vega Extra Cobra® (Signature)

Vega Extra Cobra (Sildenafil citrate) 120 mg

Vega Extra Cobra
Sildenafil citrate
120 mg × 180 pills
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Information

Contraindications

hypersensitivity to Vegah Extra 130 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 Vega Pills enhances the hypotensive effect of nitrates (see "Interaction»);

the combined use of inhibitors of PDE5, including Vega Extra Strong 120, 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 Sildenafil Tablets Vega Extra Cobra 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.

Sildenafil Tablets Vegah Extra Cobra 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.

Sildenafil Tablets Vega Extra Cobra 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 Sildenafil Tablets Vega Extra Cobra 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. Sildenafil Tablets Vega Extra Cobra 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 Vegal Extra is sexual stimulation.

Sildenafil Tablets Vega Extra Cobra restores impaired erectile function in conditions of sexual stimulation by increasing blood flow to the cavernous bodies of the penis.

Dosage and administration

Inside, can be taken with or without water. When taking the drug, you should put a tablet, dispersed in the oral cavity, on the tongue, after which it will quickly dissolve, and it can be swallowed. The tablet should be taken immediately after opening the blister. Patients who are recommended a dose of Sildenafil Tablets Vega Extra Cobra 100 mg, the second tablet of Sildenafil Tablets Vega Extra Cobra 50 mg should be taken after complete dissolution of the first tablet.

The recommended dose for most adult patients is 50 mg approximately 1 hour before sexual activity. Taking into account the effectiveness and tolerability of the dose can be increased to 100 mg or reduced to 25 mg (only tablets coated with a film, the appropriate dosage). The maximum recommended dose is 100 mg. Patients who are recommended a dose of Sildenafil Tablets Vega Extra Cobra 100 mg, it is necessary to take 2 table., dispersible in the oral cavity, dosage 50 mg consecutively one after another. The maximum recommended frequency of use — 1 time per day. It should be borne in mind that the absorption of Sildenafil Tablets Vega Extra Cobra significantly slows down when used in combination with fatty foods.

Special patient groups

Renal impairment. In mild to moderate renal failure dose adjustment is not required, in severe renal failure (Creatinine CL <30 ml/min) Sildenafil Tablets Vega Extra Cobra dose should be reduced to 25 mg.

Hepatic impairment. Since the excretion of Sildenafil Tablets Vega Extra Cobra is disturbed in patients with liver damage (in particular, cirrhosis), the dose of Vegah Cobra should be reduced to 25 mg.

Joint application with other drugs. Joint use with ritonavir is not recommended. In any case, the maximum dose of Sildenafil Tablets Vega Extra Cobra under any circumstances should not exceed 25 mg, and the frequency of application — 1 time in 48 h (see "Interaction").

When combined with inhibitors of CYP3A4 isoenzyme (erythromycin, saquinavir, ketoconazole, Itraconazole), the initial dose of Sildenafil Tablets Vega Extra Cobra should be 25 mg (see "Interaction").

To minimize the risk of postural hypotension in patients taking α-blockers, Sildenafil Tablets Vega Extra Cobra should be started only after achieving hemodynamic stabilization in these patients. Consideration should also be given to reducing the initial dose of Sildenafil Tablets Vega Extra Cobra (see special instructions and Interactions).

Old age. Adjustment of the dose of Signature Cobra Vega is not required.

Cardiovascular complications

During the post-marketing use of Sildenafil Tablets Vega Extra Cobra 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 Sildenafil Tablets Vega Extra Cobra. 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 Vegab Extra 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 Sildenafil Tablets Vega Extra Cobra, 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 Sildenafil Tablets Vega Extra Cobra 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 Sildenafil Tablets Vega Extra Cobra, in such patients should be used with caution and only in situations where the expected benefit outweighs the risk.

When using the drug Sildenafil Tablets Vega Extra Cobra 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 Sildenafil Tablets Vega Extra Cobra

The metabolism of Sildenafil Tablets Vega Extra Cobra occurs mainly under the action of CYP3A4 isoenzyme (main pathway), so inhibitors of this isoenzyme can reduce the clearance of Cobra Vega 120, and inducers, respectively, increase the clearance of Sildenafil Tablets Vega Extra Cobra. A decrease in the clearance of Sildenafil Tablets Vega Extra Cobra with simultaneous use of inhibitors of CYP3A4 isoenzyme (ketoconazole, erythromycin, cimetidine).

Cimetidine (800 mg), a nonspecific inhibitor of CYP3A4 isoenzyme, when taken together with Sildenafil Tablets Vega Extra Cobra (50 mg) causes an increase in the concentration of Sildenafil Tablets Vega Extra Cobra in plasma by 56%.

A single dose of 100 mg of Vegah Extra 120 Indication 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 Vegah Extra 120 Indication by 182%.

When co-administered Sildenafil Tablets Vega Extra Cobra (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 Sildenafil Tablets Vega Extra Cobra 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 Vega Extra 120.

The simultaneous use of Sildenafil Tablets Vega Extra Cobra (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 Vega Coin by 300% (4 times), a AUC by 1000% (11-fold). After 24 h, the concentration of Cobra Vega Extra in blood plasma is about 200 ng/ml (after a single application of one Sildenafil Tablets Vega Extra Cobra — 5 ng/ml). This is consistent with the ritonavir effect on a wide range of cytochrome P450 substrates. Signature Cobra Vega does not affect the pharmacokinetics of ritonavir. Given these data, the simultaneous reception of ritonavir and Cobra Vega 120 Mg is not recommended. In any case, the maximum dose of Sildenafil Tablets Vega Extra Cobra under any circumstances should not exceed 25 mg for 48 hours. If Cobra Vega Extra Strong 120 Mg is taken in the recommended doses, patients receiving strong inhibitors of CYP3A4 isoenzyme at the same time, then Cmax free Sildenafil Vega Extra 120 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 Vega Extra Strong 120.

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 Sildenafil Tablets Vega Extra Cobra in Css (80 mg 3 times a day) showed a decrease in AUC and Cmax Sildenafil Vega Extra 130 by 62.6 and 52.4%, respectively. Vega Extra 120 Mg increased the AUC and Cmax of bosentan by 49.8 and 42%, respectively.

It is assumed that the simultaneous use of Cobra Vega 120 with powerful inducers of CYP3A4 isoenzyme, such as rifampicin, can lead to a greater decrease in the concentration of Sildenafil Tablets Vega Extra Cobra 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 Sildenafil Tablets Vega Extra Cobra.

Azithromycin (500 mg/day for 3 days) has no effect on AUC, Cmax, Tmax, excretion rate constant and T1/2 Vegah Extra 120 Indication or its main circulating metabolite.



Cobra Vega Extra Strong 120mg

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