Visual impairment
In rare cases, during post-approval use of all of the inhibitors of PDE5, including Signature Cobra 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 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 Vegah 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 Vegah Extra Cobra, in such patients should be used with caution and only in situations where the expected benefit outweighs the risk. In patients with episodes of development PINZN with loss of vision in one eye receiving Sildenafil Tablets Vegah Extra Cobra is contraindicated (see "Contraindications").
A small number of patients with hereditary retinitis pigmentosa have genetically determined disorders of the PDE of the retina. Information about the safety of the drug Vegah Cobra in patients with retinitis pigmentosa absent, so these patients should not be used Vega Cobra 120 (see "Contraindications").
Vegah 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.
Vegah 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 Vegah 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. Cobra Vega 120 Mg 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 Vegah Cobra is sexual stimulation.
Vegah Cobra restores impaired erectile function in conditions of sexual stimulation by increasing blood flow to the cavernous bodies of the penis.
Hearing impairment
Some post-marketing and clinical studies have reported cases of sudden hearing loss or impairment associated with the use of all PDE-5 inhibitors, including Vegah Cobra. Most of these patients had risk factors for sudden impairment or hearing loss. There is no causal relationship between the use of PDE-5 inhibitors and sudden hearing impairment or hearing loss. In case of sudden hearing impairment or hearing loss while taking Vegah Cobra, consult a doctor immediately.
Bleedings
Vegah Cobra enhances the antiplatelet effect of sodium nitroprusside, a nitric oxide donator, on human platelets in vitro. Data on the safety of Vegah Extra 120 Mg in patients with a tendency to bleeding or exacerbation of gastric ulcer and duodenal ulcer are not available, so the drug Vegah Cobra in these patients should be used with caution (see With caution).
The incidence of nosebleeds in patients with pulmonary hypertension associated with diffuse connective tissue diseases was higher (Vega Visa — 12.9%, placebo — 0%) than in patients with primary pulmonary arterial hypertension (Vegah Cobra — 3%, placebo — 2.4%). Patients receiving Vegah Cobra in combination with an antagonist of vitamin K, the frequency of nasal bleeding was higher (8.8 percent) than patients who were not taking an antagonist of vitamin K (1.7 percent).
Use in conjunction with other means for the treatment of erectile dysfunction
The safety and efficacy of Vegah Cobra together with other PDE-5 inhibitors or other drugs for the treatment of pulmonary hypertension containing Vegah Cobra (eg, Revatsio®), or other means for the treatment of erection disorders have not been studied, so the use of such combinations is not recommended (see "Contraindications").
Influence on the ability to drive and mechanisms. In patients receiving Vega Extra 120 any negative effect on the ability to drive a car or other means was not observed. However, since when taking Vegab Extra may develop dizziness, lowering blood PRESSURE, the development of chromatopsia, blurred vision, etc. side effects, care should be taken when driving and doing other potentially dangerous activities that require increased concentration and speed of psychomotor reactions. Also, you should be careful about the individual action of the drug in these situations, especially at the beginning of treatment and when changing the dosage regimen.
Vegah Cobra is a weak inhibitor of cytochrome P450 — 1A2, 2C9, 2C19, 2D6, 2E1 and 3A4 ISOENZYMES (IC50 >150 µmol). When taking Vega Extra Cobra 120 in recommended doses, its Cmax is about 1 µmol, so it is unlikely that Vega Cobra 120 can affect the clearance of the substrates of these isoenzymes.
Vegah Cobra 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 Vegal Extra in combination with nitrates or nitric oxide donators is contraindicated. While taking α-adrenoblocker doxazosin (4 and 8 mg) and Vegah Cobra (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 Vega Extra 120 Mg 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.
Vegah Extra 120 Mg (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 Cobra Vega Extra Strong 120mg 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.
Vegah Extra 130 (50 mg) does not cause an additional increase in bleeding time when taking acetylsalicylic acid (150 mg).
Cobra Vega Extra Strong 120mg (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 120 (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 Vegah Cobra in combination with antihypertensive agents does not lead to additional side effects.
Vegab Extra
