The use of sildenafil and an α1 blocker (typically prescribed for hypertension or for urologic conditions, such as benign prostatic hypertrophy) at the
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same time may lead to low blood pressure, but this effect does not occur if they are taken at least 4 hours apart.
Tentative evidence suggests that sildenafil may help males who experience antidepressant-induced erectile dysfunction. While sildenafil improves some markers of disease in people with pulmonary arterial hypertension, it does not appear to affect the risk of death or serious side effects. Sildenafil and other PDE5 inhibitors are used off-label to alleviate vasospasm and treat severe ischemia and ulcers in fingers and toes for people with secondary Raynaud's phenomenon;[9][21] these drugs have moderate efficacy for reducing the frequency and duration of vasospastic episodes. [9] As of 2016,[update] their role more generally in Raynaud's was not clear. Sildenafil has shown some potential for improving exercise performance at high altitudes.
However, its overall efficacy is not clear. Sildenafil has been studied for high-altitude pulmonary edema (HAPE), but its use is currently not recommended for that indication. In clinical trials, the most common adverse effects of sildenafil use included headache, flushing, indigestion, nasal congestion, and impaired vision, including photophobia and blurred vision. [4] Some sildenafil users have complained of seeing everything tinted blue (cyanopsia). [24] This cyanopsia can be explained because sildenafil, while selective for PDE5, does have some affinity for PDE6, which is the phosphodiesterase found in the retina. Concomitant use of nitric oxide donors, organic nitrites and nitrates,[30] such as: nitroglycerinisosorbide mononitrateisosorbide dinitratesodium nitroprussidealkyl nitrites (commonly known as "poppers") Concomitant use
of soluble guanylyl cyclase stimulators, such as riociguat Sildenafil should not be
| Medication | Average Cost per 10mg (USD) | Effectiveness Leader | Notes |
|---|---|---|---|
| Vardenafil | $15 | Yes | Shorter onset time than Tadalafil |
| Sildenafil | $10 - $20 | Yes | Most common, widely available |
| Tadalafil | $20 - $30 | Longer-lasting | Higher price for branded versions |
used if sexual activity is inadvisable due to underlying cardiovascular risk factors.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Cialis Generic | 5mg | 60 + 4 Pills | 86.02€ 81.92€ | |
| Cialis Professional | 20mg | 60 + 2 Pills | 183.83€ 175.08€ | |
| Tadalista Super Active | 20mg | 180 + 20 Pills | 521.59€ 496.75€ | |
| Cialis Super Active | 20mg | 10 Pills | 55.64€ 52.99€ | |
| Cialis Generic | 10mg | 180 + 8 Pills | 236.88€ 225.60€ | |
| Kamagra Effervescent Tablets | 100 mg | 63 + 7 Pills | 171.99€ 163.80€ | |
| Kamagra Effervescent Tablets | 100 mg | 84 + 7 Pills | 202.91€ 193.25€ | |
| Levitra Generic | 40mg | 20 Pills | 67.56€ 64.34€ | |
| Super Kamagra | 160 mg | 4 Pills | 41.99€ 39.99€ | |
| Viagra Generic | 25mg | 270 + 8 Pills | 184.26€ 175.49€ | |
| Kamagra | 100mg | 120 + 6 Pills | 330.74€ 314.99€ | |
| Levitra Original | 20mg | 8 Pills | 65.05€ 61.95€ | |
| Kamagra Gold | 50 mg | 360 + 6 Pills | 713.95€ 679.95€ | |
| Cialis Professional | 20mg | 120 + 4 Pills | 291.68€ 277.79€ | |
| Levitra Original | 20mg | 34 + 2 Pills | 188.51€ 179.53€ | |
| Cialis Generic | 40mg | 20 Pills | 59.47€ 56.64€ | |
| Viagra Generic | 25mg | 360 + 10 Pills | 213.68€ 203.50€ |
Sildenafil's popularity with young adults has increased over the years.
[8][10] Onset when taken orally is typically within twenty minutes and lasts for about two hours. Common side effects include headaches, heartburn, and flushed skin. [8] Caution is advised in those with cardiovascular disease. [8] Rare but serious side effects include vision problems, hearing loss, and prolonged erection (priapism) that can lead to damage to the penis. [8] Sildenafil should not be taken by people on nitric oxide donors such as nitroglycerin, as this may result in a serious drop in blood pressure.
Sildenafil acts by blocking phosphodiesterase 5 (PDE5), an enzyme that promotes breakdown of cGMP, which regulates blood flow in the penis. [8] It requires sexual arousal to work, and does not by itself cause or increase sexual arousal. [8] It also results in dilation of the blood vessels in the lungs. Pfizer originally discovered the medication in 1989 while looking for a treatment for angina. [11] It was approved for medical use in the United States and in the European Union in 1998.
[5][8][11][12] In 2023, it was the 151st most commonly prescribed medication in the United States, with more than 3 million prescriptions. [13][14] It is available as a generic medication. [15][16] In the United Kingdom, it is available as a pharmacy medicine. The primary indication of sildenafil is treatment of erectile dysfunction (inability to sustain a satisfactory erection to complete sexual intercourse). Its use is now one of the standard treatments for erectile pills to increase sex drive male dysfunction, including for males with diabetes mellitus. [32] Sildenafil's brand name, Viagra, is widely recognized in popular culture, and
[4] In October 2007, the FDA announced that the labeling for all PDE5 inhibitors, including sildenafil, required a more prominent warning of the potential risk of sudden hearing loss. Care should be exercised by people who are also taking protease inhibitors for the treatment of HIV infection. Protease inhibitors inhibit the metabolism of sildenafil, effectively multiplying the plasma levels of sildenafil, increasing the incidence and severity of side effects. Those using protease inhibitors are recommended to limit their use of sildenafil to no more than one 25 mg dose every 48 hours. [4] Other drugs that interfere with the metabolism of sildenafil include erythromycin and cimetidine, both of which can also lead to prolonged plasma half-life levels. the drug's association with treating erectile dysfunction has led to its recreational use.
| Quantity Purchase | Price per 20mg (USD) | Savings Compared to Single Purchase | Vendor Type |
|---|---|---|---|
| 50 Pills | $8 - $12 | 30-50% | Online Wholesale |
| 100 Pills | $7 - $10 | 40-60% | International Supplier |
| 200+ Pills | $6 - $9 | Up to 70% | Bulk Discount Deals |
[33] The reasons behind such use include the belief that the drug increases libido, improves sexual performance,[33] or permanently increases penis size.
SynZeal products are for analytical purpose only and not for human use. buy high quality N-Desethyl-N-Methyl Vardenafil N-Desethyl-N-Methyl Vardenafil for Method Validation N-Desethyl-N-Methyl Vardenafil for ANDA Filing N-Desethyl-N-Methyl Vardenafil for Forced Degradation Studies N-Desethyl-N-Methyl Vardenafil for DMF Filing SynZeal product information given on this website is as per the existing understanding while publishing the details on website. The customer is responsible for assessing the accuracy of the information at the time of actual purchase. SynZeal will update these details as per new developments or findings in product specifications without further notice. Levitra may also be used for purposes not listed in this medication guide.
Levitra has an average rating of 7.8 out of 10 from a total of 133 ratings on Drugs.com. 72% of reviewers reported a positive effect, while cenforce 200 tablets 12% reported a negative effect. Vardenafil has an average rating of 7.9 out of 10 from a total of 171 ratings on Drugs.com. We could not find an exact match for this medicine. A total of 530 drugs are known to interact with Levitra: A total of 530 drugs are known to interact with Vardenafil: Grapefruit juice may increase the blood levels of certain medications such as vardenafil.
Grapefruit juice may increase the blood levels of certain medications such as vardenafil. Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. [4][8] It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. [9] It is unclear if it is effective for treating sexual dysfunction in females. [8] It can be taken orally (swallowed by mouth), intravenously (injection into a vein), or through the sublingual route (dissolved under the tongue). [34] Studies on the effects of sildenafil when used recreationally are limited, but suggest
If you are using the ODT, place it on your tongue with dry hands, and allow it to dissolve completely without liquid. Always take vardenafil exactly as prescribed by your healthcare provider, and do not exceed the recommended dose. Certain substances and medications can interact with vardenafil. Avoid drinking grapefruit juice, which can affect how the medication is processed in your body. Alcohol may increase the risk of side effects such as dizziness or low blood pressure.
Vardenafil should not be taken with nitrate medications, including nitroglycerin, isosorbide dinitrate, riociguat, or isosorbide mononitrate, because this combination can cause dangerously low blood pressure. Do not combine vardenafil with other ED medications. Tell your healthcare provider if you take medications for high blood pressure, alpha-blockers, antifungal medications such as fluconazole, or other treatments for ED, as there may be drug interactions. You should also mention any supplements you use, especially St. John’s wort.
Vardenafil may not be appropriate for people with certain heart conditions, Peyronie's disease, or those who are advised to avoid sexual activity. Always follow your provider’s guidance to ensure safe and effective use of the medication. N-Desethyl-N-Methyl Vardenafil is supplied with detailed characterization data compliant with regulatory guideline. N-Desethyl-N-Methyl Vardenafil can be used for the analytical method development, method validation (AMV), Quality Controlled (QC) application for Abbreviated New Drug Application (ANDA) or during commercial production of Vardenafil. The product can be used as reference standards and further traceability against pharmacopeial standards (USP or EP) can be provided based on feasibility. it has little effect when used by those who do not have erectile dysfunction.
Patients thus taking the drug may experience colorvision abnormalities. Some complained of blurriness and loss of peripheral vision. In July 2005, the US Food and Drug Administration (FDA) updated labeling for tadalafil (Cialis), vardenafil (Levitra), and sildenafil (Viagra) to reflect a small number of post-marketing reports of sudden vision loss, while acknowledging that "...it is not possible to determine whether these oral medicines for erectile dysfunction were the cause of the loss of eyesight or whether the problem is related to other factors such as high blood pressure or diabetes, or to a combination of these problems. "[25] A careful review of pooled data from clinical trials containing well documented information about the dose and duration of exposure to the drug for a large number of patients, yields no evidence for an increased risk of non-arteritic anterior ischemic optic neuropathy or other adverse ocular events associated with PDE5 inhibitor use. Rare but serious adverse effects found through postmarketing surveillance include prolonged erections, severe low blood pressure, myocardial infarction (heart attack), ventricular arrhythmias, stroke, increased intraocular pressure, and sudden hearing loss. In one study, a 25 mg dose was shown to cause no significant change in erectile quality, but did reduce the postejaculatory refractory time.
[35] This study also noted a significant placebo effect in the control group.
Unprescribed recreational use of sildenafil and other PDE5 inhibitors is noted as particularly high among users of illegal drugs.