Vardenafil (Levitra) is an oral therapy for the treatment of erectile dysfunction. It is a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE5). Penile erection is a hemodynamic process initiated by the relaxation of smooth muscle in the corpus cavernosum and its associated arterioles.
During sexual stimulation, nitric oxide is released from nerve endings and endothelial cells in the corpus cavernosum.
Nitric oxide activates the enzyme guanylate cyclase resulting in increased synthesis of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the corpus cavernosum. The cGMP in turn triggers smooth muscle relaxation, allowing increased blood flow into the penis, resulting in erection. The tissue concentration of cGMP is regulated by both the rates of synthesis and degradation via phosphodiesterases (PDEs)
Snovitra XL is an effective oral treatment for erectile dysfunction. It contains 60mg of the active ingredient Vardenafil. The usual adult dose of Vardenafil is 10mg as an initial dose, about 30 minutes to 1 hour before sexual activity.
A tablet of Snovitra XL must be taken orally, swallowed whole with a glassful of water. The tablet may be taken with or without food, although high-fat meals may delay the effects of the drug. It is best taken on an empty stomach or after a low-fat meal. Intake of Snovitra XL must not exceed one tablet per day with 24 hours apart from the next dose, as the drug is not intended for daily use.
Vardenafil is used to treat male erectile dysfunction (impotence) and pulmonary arterial hypertension (PAH). Part of the physiological process of erection involves the release of nitric oxide (NO) in the corpus cavernosum.
This then activates the enzyme guanylate cyclase which results in increased levels of cyclic guanosine monophosphate (cGMP), leading to smooth muscle relaxation in the corpus cavernosum, resulting in increased inflow of blood and an erection. Vardenafil is a potent and selective inhibitor of cGMP specific phosphodiesterase type 5 (PDE5) which is responsible for degradation of cGMP in the corpus cavernosum.
This means that, with vardenafil on board, normal sexual stimulation leads to increased levels of cGMP in the corpus cavernosum which leads to better erections. Without sexual stimulation and no activation of the NO/cGMP system, vardenafil should not cause an erection.
Vardenafil inhibits the cGMP specific phosphodiesterase type 5 (PDE5) which is responsible for degradation of cGMP in the corpus cavernosum located around the penis. Penile erection during sexual stimulation is caused by increased penile blood flow resulting from the relaxation of penile arteries and corpus cavernosal smooth muscle.
This response is mediated by the release of nitric oxide (NO) from nerve terminals and endothelial cells, which stimulates the synthesis of cGMP in smooth muscle cells. Cyclic GMP causes smooth muscle relaxation and increased blood flow into the corpus cavernosum. The inhibition of phosphodiesterase type 5 (PDE5) by vardenafil enhances erectile function by increasing the amount of cGMP.
Metabolism: Vardenafil is metabolized predominantly by the hepatic enzyme CYP3A4, with contribution from the CYP3A5 and CYP2C isoforms. The major circulating metabolite, M1, results from desethylation at the piperazine moiety of vardenafil. M1 shows a phosphodiesterase selectivity profile similar to that of vardenafil and an in vitro inhibitory potency for PDE5 28% of that of vardenafil.
Absorption: Vardenafil is rapidly absorbed with absolute bioavailability of approximately 15%.
Route of elimination: After oral administration, vardenafil is excreted as metabolites predominantly in the feces (approximately 91-95% of administered oral dose) and to a lesser extent in the urine (approximately 2-6% of administered oral dose).
Half life: 4-5 hours
All medicines may cause side effects, but many people have no, or minor, side effects.Some medical conditions may interact with Vardenafil.
Tell your doctor or pharmacist if you have any medical conditions.
Common side effects may include: flushing (warmth, redness, or tingly feeling)stuffy nose, sinus painheadache, dizzinessupset stomach or back pain.
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider.