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 Extra Vega 100 mg, the second tablet of Extra Vega 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 Vega Extra 130 Mg 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 Extra Vega 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) Extra Vega dose should be reduced to 25 mg.
Hepatic impairment. Since the excretion of Extra Vega is disturbed in patients with liver damage (in particular, cirrhosis), the dose of Sildenafil Vega Extra 130 Mg 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 Vega Extra 130 Mg 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 Vega Cobra 120 should be 25 mg (see "Interaction").
To minimize the risk of postural hypotension in patients taking α-blockers, Extra Vega should be started only after achieving hemodynamic stabilization in these patients. Consideration should also be given to reducing the initial dose of Vega Extra Cobra (see special instructions and Interactions).
Old age. Adjustment of the dose of Extra 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 Extra Vega. 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 Extra Vega 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 Extra Vega, 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 Vega Coin 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 Vega Coin, in such patients should be used with caution and only in situations where the expected benefit outweighs the risk.
When using the drug Extra Vega 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
The metabolism of Extra Vega occurs mainly under the action of CYP3A4 isoenzyme (main pathway), so inhibitors of this isoenzyme can reduce the clearance of Extra Vega, and inducers, respectively, increase the clearance of Extra Vega. A decrease in the clearance of Extra Vega with simultaneous use of inhibitors of CYP3A4 isoenzyme (ketoconazole, erythromycin, cimetidine).
Cimetidine (800 mg), a nonspecific inhibitor of CYP3A4 isoenzyme, when taken together with Vegah Cobra (50 mg) causes an increase in the concentration of Extra Vega in plasma by 56%.
A single dose of 100 mg of Sildenafil Vega Extra 130 Mg Cobra 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 Extra Vega by 182%.
When co-administered Extra Vega (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 Vega Extra 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 Cobra Vega 120.
The simultaneous use of Vega Extra Cobra 120 (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 Extra Vega by 300% (4 times), a AUC by 1000% (11-fold). After 24 h, the concentration of Vega Cobra in blood plasma is about 200 ng/ml (after a single application of one Vega Extra 120 Mg — 5 ng/ml). This is consistent with the ritonavir effect on a wide range of cytochrome P450 substrates. Cobra Vega Extra does not affect the pharmacokinetics of ritonavir. Given these data, the simultaneous reception of ritonavir and Extra Vega is not recommended. In any case, the maximum dose of Vega Pills under any circumstances should not exceed 25 mg for 48 hours. If Extra Vega is taken in the recommended doses, patients receiving strong inhibitors of CYP3A4 isoenzyme at the same time, then Cmax free Extra Vega 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 Vegah Extra 130.
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 Cobra Vega Extra in Css (80 mg 3 times a day) showed a decrease in AUC and Cmax Cobra Vega 120 by 62.6 and 52.4%, respectively. Vega Extra 120 increased the AUC and Cmax of bosentan by 49.8 and 42%, respectively.
It is assumed that the simultaneous use of Extra Vega with powerful inducers of CYP3A4 isoenzyme, such as rifampicin, can lead to a greater decrease in the concentration of Vega Extra 120 Mg 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 Extra Vega.
Azithromycin (500 mg/day for 3 days) has no effect on AUC, Cmax, Tmax, excretion rate constant and T1/2 Vegab Extra or its main circulating metabolite.
Extra Vega is a weak inhibitor of cytochrome P450 — 1A2, 2C9, 2C19, 2D6, 2E1 and 3A4 ISOENZYMES (IC50 >150 µmol). When taking Vegah Extra 120 Mg in recommended doses, its Cmax is about 1 µmol, so it is unlikely that Vega Cobra can affect the clearance of the substrates of these isoenzymes.
Extra Vega increases the hypotensive effect of nitrates both with long-term use of the latter, and with their appointment for urgent indications. In this regard, the use of Vega Extra 120 in combination with nitrates or nitric oxide donators is contraindicated. While taking α-adrenoblocker doxazosin (4 and 8 mg) and Vega Cobra 120 Mg (25, 50 and 100 mg) in patients with benign prostate hyperplasia with stable hemodynamics, the average additional decrease in sad/dad in the supine position was 7/7, 9/5 and 8/4 mm Hg.article, respectively, while in the standing position — 6/6, 11/4 mmHg, and 4/5.art. respectively. Reported rare cases of symptomatic postural hypotension in such patients, manifested in the form of dizziness (without fainting). In some sensitive patients receiving α-blockers, simultaneous use of Extra Vega can lead to symptomatic hypotension.
There were no signs of significant interaction with tolbutamide (250 mg) or warfarin (40 mg), which are metabolized by CYP2C9 isoenzyme.
Extra Vega (100 mg) has no effect on the pharmacokinetics of the HIV protease inhibitor, saquinavir, which is a substrate of CYP3A4 isoenzyme, at its constant level in the blood.
The simultaneous use of Vega Cobra 120 Mg at equilibrium (80 mg 3 times a day) leads to an increase in the AUC and Cmax of bosentan (125 mg 2 times a day) by 49.8 and 42%, respectively.
Extra Vega (50 mg) does not cause an additional increase in bleeding time when taking acetylsalicylic acid (150 mg).
Extra Vega (50 mg) does not increase the hypotensive effect of alcohol in healthy volunteers with Cmax of alcohol in the blood on average 0.08‰ (80 mg/DL).
In patients with hypertension, no signs of interaction of Sildenafil Vega Extra 130 Mg Cobra (100 mg) with amlodipine were found. The average additional reduction in blood PRESSURE in the supine position is 8 mm Hg.V. (systolic) and 7 mm Hg.V. (diastolic).
The use of Extra Vega in combination with antihypertensive agents does not lead to additional side effects.
Clinical data
In a placebo-controlled cross-examination of patients with proven early age macular degeneration (n=9), Extra Vega was well tolerated at a single dose of 100 mg. There were no clinically significant changes in vision evaluated by special visual tests (visual acuity, Amsler lattice, color perception, color simulation, Humphrey perimeter and photostress).
Efficiency. The efficacy and safety of Extra Vega were evaluated in 21 randomized double-blind placebo-controlled studies lasting up to 6 months in 3000 patients from 19 to 87 years with erectile dysfunction of different etiology (organic, psychogenic or mixed). The efficacy of the drug was evaluated globally using an erection diary, an international erectile function index (validated questionnaire on the state of sexual function) and a partner survey.
The effectiveness of Vega Extra, defined as the ability to achieve and maintain an erection sufficient for satisfactory sexual intercourse, has been demonstrated in all studies and confirmed in long-term studies lasting 1 year. In studies with the use of fixed-dose proportion of patients reporting that treatment improved their erections were 62% (dose of Sildenafil Tablets Vega Extra Cobra 25 mg), 74% (dose Extra Vega 50 mg) and 82% (dose Cobra Vega 100 mg) compared to 25% in the placebo group. Analysis of the international index of erectile function showed that in addition to improving erection treatment Extra Vega also increased the quality of orgasm, allowing to achieve satisfaction from sexual intercourse and overall satisfaction.
According to the generalized data, 59% of patients with diabetes, 43% of patients who underwent radical prostatectomy and 83% of patients with spinal cord injuries (against 16, 15 and 12% in the placebo group, respectively) were reported to have improved erection in the treatment of Extra Vega.
Pharmacokinetics
Vega Extra Strong 120
