The Onset and Duration of Vardenafil's Effects

Tell your healthcare provider about all medicines that you take or have recently taken. This may not be a complete list of medicines that can interact with vardenafil. If you or someone else has taken too much vardenafil, get medical help right away, call 911, or contact a Poison Control center at 800-222-1222. Take it as your healthcare provider recommends, which is usually about one hour before planned sexual activity. Do not take double or extra doses. This survey is being conducted by the WebMD marketing sciences department. Check access to the full text by signing in through your organization. The worldwide prevalence and epidemiology of erectile dysfunctionInt J Impot Res(2000) et al.The likely worldwide increase in erectile dysfunction between 1995 and 2025 and some possible policy consequencesBJU Int(1999) et al.The effect of erectile dysfunction on the quality of life of men after radical prostatectomyBJU Int(2003) et al.Health-related quality of life in a UK-based population of men with erectile dysfunctionPharmacoeconomics(2002) et al.Vardenafil for treatment of men with erectile dysfunction: efficacy and safety in a randomized, double-blind, placebo-controlled trialJ Androl(2002) et al.Erectile response with vardenafil in sildenafil nonresponders: a multicentre, double-blind, 12-week, flexible-dose, placebo-controlled erectile dysfunction clinical trialBJU Int(2004) et al.Sexual ecology of men with ED: Timing, periodicity and predictability of sexual activity of men in the MALES 2004 StudyJ Sex Med(2005) et al.Sexual experience of female partners of men with erectile dysfunction: the Female Experience of Men’s Attitudes to Life Events and Sexuality (FEMALES) studyJ Sex Med(2005) et al.Improving the sexual quality of life of couples affected by erectile dysfunction: a double-blind, randomized, placebo-controlled trial of vardenafilJ Sex Med(2005) et al.Sustained efficacy and safety of vardenafil for treatment of erectile dysfunction: a randomized, double-blind, placebo-controlled studyMayo Clin Proc(2005) Pharmacotherapy for Erectile Dysfunction: Recommendations From the Fourth International Consultation for Sexual Medicine (ICSM 2015)2016, Journal of Sexual MedicineCitation Excerpt :The extended t1/2 of tadalafil provides a longer therapeutic effect (up to 36 hours),22 and this also might be the case for udenafil (up to 12 hours).23 The duration of action for avanafil is longer than 6 hours,24 that for sildenafil is at least 12 hours,25 and that for vardenafil is at least 10 hours.26 The limited published data have shown that the onset and duration of action for mirodenafil12 and lodenafil27 are similar to those for sildenafil. The extended t1/2 of tadalafil provides a longer therapeutic effect (up to 36 hours),22 and this also might be the case for udenafil (up to 12 hours).23 The duration of action for avanafil is longer than 6 hours,24 that for sildenafil is at least 12 hours,25 and that for vardenafil is at least 10 hours.26 The limited published data have shown that the onset and duration of action for mirodenafil12 and lodenafil27 are similar to those for sildenafil. SOP Conservative (Medical and Mechanical) Treatment of Erectile Dysfunction2013, Journal of Sexual MedicineCitation Excerpt :High-affinity components of a PDE5 inhibitor show a considerably longer dissociation time from the target molecule. This explains why vardenafil showed in clinical use a clearly longer duration of efficacy than it would be suspected by its half-life time [28]. High-affinity components of a PDE5 inhibitor show a considerably longer dissociation time from the target molecule. A Randomised, Placebo-Controlled Study to Assess the Efficacy of Twice-Daily Vardenafil in the Treatment of Lower Urinary Tract Symptoms Secondary to Benign Prostatic Hyperplasia2008, European UrologyCitation Excerpt :Vardenafil was administered at a dose of 10 mg twice daily in this study. This regimen was chosen on the basis that the 10-mg dose is generally effective in the treatment of ED, but is well below the maximum permitted dose of 20 mg [24]. Also, although the half-life of vardenafil is 4–5 h, experience indicates that it is effective for up to 12 h after administration [24].

Risks of Counterfeits, Illegal Online Sales, and ‘Miracle Supplements’ Containing Hidden Vardenafil

However, switching to another PDE5 inhibitor after an episode of clinically apparent liver injury should be done with caution. References to vardenafil induced liver injury are provided in the Overview section on PDE5 Inhibitors. Other Drugs in the Class: Avanafil, Sildenafil, Tadalafil Product labeling at DailyMed, National Library of Medicine, NIH Levitra (vardenafil) remains one of the most recognizable names among erectile dysfunction (ED) medications, yet the brand itself has been marked as officially discontinued in several major markets, including the United States. This discontinuation often leads to confusion, with some users assuming that the drug was removed for safety or efficacy concerns. In reality, the reason is far simpler: business strategy and market dynamics, not medical risk.

Less common

According to public sources, historical product documentation from Bayer, and legal reporting on FindLaw, the discontinuation of brand-name Levitra reflects a familiar pattern seen across many pharmaceutical markets. Once the patent window closed and generic vardenafil became widely available, brand sales declined rapidly. PDE5 inhibitors also faced increasingly competitive pressure from Cialis and Viagra, whose brand recognition and longer marketing presence dominated the market. Maintaining a brand-name product becomes less economically viable when generics offer the same active ingredient at a fraction of the price. For large pharmaceutical companies, discontinuation under these circumstances is a routine business decision.

Quality of life and erectile dysfunction

Importantly, the active ingredient (vardenafil) was not discontinued. Generic vardenafil remains fully available and FDA-, EMA-, and internationally approved. The safety profile of the drug has not changed, and clinical evidence supporting its effectiveness remains robust. In many regions, only the brand name Levitra disappeared from distribution, while generic equivalents remained on pharmacy shelves. Another factor contributing to brand discontinuation is the shift toward telehealth prescribing and online pharmacies, where generics are typically preferred due to lower cost. Vardenafil was administered at a dose of 10 mg twice daily in this study. Phosphodiesterase Type 5 Inhibitors: The Day After2007, European UrologyCitation Excerpt :Initial reports characterised sildenafil and vardenafil as short-acting drugs for up to 4 h. On the other hand, the duration of action of tadalafil was initially reported to be 24 h. Consecutive trials, however, have shown a consistent efficacy of tadalafil for up to 36 h [36]. Clinical experience has shown that the duration of action of both sildenafil and vardenafil far exceeds the 4-h therapeutic window; initial reports on sildenafil and vardenafil have shown that both drugs may be efficacious for 8–12 h after dosing [37,38]. Until the availability of convincing data, however, the duration of flibanserin sildenafil and vardenafil remains under question. Initial reports characterised sildenafil and vardenafil as short-acting drugs for up to 4 h. On the other hand, the duration of action of tadalafil was initially reported to be 24 h. Consecutive trials, however, have shown a consistent efficacy of tadalafil for up to 36 h [36].

Point	Explanation	Key Advice
Take on an empty stomach or light meal	Food may delay absorption but not reduce efficacy	Take at least 30 minutes before activity
Do not exceed prescribed dose	Risk of side effects	Follow doctor's instructions
Seek medical help for prolonged erection (>4 hours)	Urological emergency	Immediate medical attention
Inform doctor of other medications	To avoid interactions	Full medication list

A service of the National Library of Medicine, National Institutes of Health. LiverTox®: Clinical and Research Information on Drug-Induced Liver Injury [Internet]. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; 2012-. Vardenafil is a selective inhibitor of phosphodiesterase type 5 (PDE5) and is used as therapy of erectile dysfunction. Vardenafil has not been associated with serum aminotransferase elevations nor with clinically apparent liver injury. Vardenafil is effective in prolonging erection and was approved for use in the United States in 2003.

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Kamagra Soft Tabs	100mg	12 Pills	57.55€ 54.81€	Buy
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Kamagra Polo	100 mg	180 + 8 Pills	446.52€ 425.26€	Buy
Cialis Original	20mg	4 Pills	41.99€ 39.99€	Buy
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Levitra Generic	40mg	270 + 10 Pills	561.89€ 535.13€	Buy
Cialis Generic	20mg	20 Pills	54.72€ 52.11€	Buy
Kamagra 100 mg	100 mg	32 Pills	121.24€ 115.47€	Buy
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Vardenafil is available in tablets of 2.5, 5, 10 and 20 mg under the brand name of Levitra and as 10 mg oral disintegrating tablets under the brand name of Staxyn. The recommended dose is 10 mg as a single dose as needed one hour before sexual activity. The dose of the standard oral tablet can be increased or decreased based upon effect and tolerance, with a recommended maximum frequency of once daily and maximum dosage of 20 mg. Common side effects include dizziness, headache, flushing, hypotension, rhinitis and dyspepsia. Rare, but potentially serious adverse events include vision and hearing loss, hypotension, cardiovascular events and priapism. Despite fairly extensive use, vardenafil has not been associated with clinically apparent cases of liver injury and serum enzyme elevations during therapy are rare.

How do these drugs work?

Vardenafil is available in tablets of 2.5, 5, 10 and 20 mg under the brand name of Levitra and as 10 mg oral disintegrating tablets under the brand name of Staxyn. The recommended dose is 10 mg as a single dose as needed one hour before sexual activity. The dose of the standard oral tablet can be increased or decreased based upon effect and tolerance, with a recommended maximum frequency of once daily and maximum dosage of 20 mg. Common side effects include dizziness, headache, flushing, hypotension, rhinitis and dyspepsia. Rare, but potentially serious adverse events include vision and hearing loss, hypotension, cardiovascular events and priapism.

How Levitra works:

Despite fairly extensive use, vardenafil has not been associated with clinically apparent cases of liver injury and serum enzyme elevations during therapy are rare. The related PDE5 inhibitors, sildenafil and tadalafil have been linked to isolated, rare instances of acute liver injury and jaundice. The latency to onset ranged from a few days to 3 months and the pattern of injury was usually cholestatic. Autoimmune and immunoallergic features were not observed and all cases were self-limited without residual injury or acute liver failure. Whether vardenafil can cause a similar form of acute liver injury is unknown.

The likely worldwide increase in erectile dysfunction between 1995 and 2025 and some possible policy consequences

Likelihood score: E* (unproven but suspected rare cause of clinically apparent liver injury). While vardenafil has not been associated with hepatotoxicity, its potential for causing hypotension and use in patients with cardiac disease may lead to instances of acute ischemic liver injury. Vardenafil, like the other PDE5 inhibitors, is metabolized in the liver via the cytochrome P450 system (CYP 3A4). While sildenafil and tadalafil have been linked 20 mg vardenafil to rare instances of clinically apparent acute liver injury, vardenafil has not. There is no known cross sensitivity in idiosyncratic adverse effects between vardenafil and the other PDE5 inhibitors currently in use in the United States. The related PDE5 inhibitors, sildenafil and tadalafil have been linked to isolated, rare instances of acute liver injury and jaundice. The latency to onset ranged from a few days to 3 months and the pattern of injury was usually cholestatic.

Price Range (per pill)	Availability	Common Suppliers	Insurance Coverage
$2 - $10	Widely available in pharmacies	Online pharmacies, local stores	Varies by insurer
Generic versions	Generally cheaper	Many online vendors	Often partially covered
Brand-name Levitra	Higher cost	Pharmacies, clinics	Depending on plan

Autoimmune and immunoallergic features were not observed and all cases were self-limited without residual injury or acute liver failure. Whether vardenafil can cause a similar form of acute liver injury is unknown.

CHEMICAL FORMULA AND STRUCTURE

Tell your healthcare provider about all medicines that you take or have recently taken. This may not be a complete list of medicines that can interact with vardenafil. If you or someone else has taken too much vardenafil, get medical help right away, call 911, or contact a Poison Control center at 800-222-1222. Take it as your healthcare provider recommends, which is usually about one hour before planned sexual activity. Do not take double or extra doses.

Who should not take Cialis:

This survey is being conducted by the WebMD marketing sciences department. Check access to the full text by signing in through your organization. The worldwide prevalence and epidemiology of erectile dysfunctionInt J Impot Res(2000) et al.The likely worldwide increase in erectile dysfunction between 1995 and 2025 and some possible policy consequencesBJU Int(1999) et al.The effect of erectile dysfunction on the quality of life of men after radical prostatectomyBJU Int(2003) et al.Health-related quality of life in a UK-based population of men with erectile dysfunctionPharmacoeconomics(2002) et al.Vardenafil for treatment of men with erectile dysfunction: efficacy and safety in a randomized, double-blind, placebo-controlled trialJ Androl(2002) et al.Erectile response with vardenafil in sildenafil nonresponders: a multicentre, double-blind, 12-week, flexible-dose, placebo-controlled erectile dysfunction clinical trialBJU Int(2004) et al.Sexual ecology of men with ED: Timing, periodicity and predictability of sexual activity of men in the MALES 2004 StudyJ Sex Med(2005) et al.Sexual experience of female partners of men with erectile dysfunction: the Female Experience of Men’s Attitudes to Life Events and Sexuality (FEMALES) studyJ Sex Med(2005) et al.Improving the sexual quality of life of couples affected by erectile dysfunction: a double-blind, randomized, placebo-controlled trial of vardenafilJ Sex Med(2005) et al.Sustained efficacy and safety of vardenafil for treatment of erectile dysfunction: a randomized, double-blind, placebo-controlled studyMayo Clin Proc(2005) Pharmacotherapy for Erectile Dysfunction: Recommendations From the Fourth International Consultation for Sexual Medicine (ICSM 2015)2016, Journal of Sexual MedicineCitation Excerpt :The extended t1/2 of tadalafil provides a longer therapeutic effect (up to 36 hours),22 and this also might be the case for udenafil (up to 12 hours).23 The duration of action for avanafil is longer than 6 hours,24 that for sildenafil is at least 12 hours,25 and that for vardenafil is at least 10 hours.26 The limited published data have shown that the onset and duration of action for mirodenafil12 and lodenafil27 are similar to those for sildenafil. The extended t1/2 of tadalafil provides a longer therapeutic effect (up to 36 hours),22 and this also might be the case for udenafil (up to 12 hours).23 The duration of action for avanafil is longer than 6 hours,24 that for sildenafil is at least 12 hours,25 and that for vardenafil is at least 10 hours.26 The limited published data have shown that the onset and duration of action for mirodenafil12 and lodenafil27 are similar to those for sildenafil. SOP Conservative (Medical and Mechanical) Treatment of Erectile Dysfunction2013, Journal of Sexual MedicineCitation Excerpt :High-affinity components of a PDE5 inhibitor show a considerably longer dissociation time from the target molecule.

What Should You Do If You Take Too Much Vardenafil?

This explains why vardenafil showed in clinical use a clearly longer duration of efficacy than it would be suspected by its half-life time [28]. High-affinity components of a PDE5 inhibitor show a considerably longer dissociation time from the target molecule. A Randomised, Placebo-Controlled Study to Assess the Efficacy of Twice-Daily Vardenafil in the Treatment of Lower Urinary Tract Symptoms Secondary to Benign Prostatic Hyperplasia2008, European UrologyCitation Excerpt :Vardenafil was administered at a dose of 10 mg twice daily in this study. This regimen was chosen on the basis that the 10-mg dose is generally effective in the treatment of ED, but is well below the maximum permitted dose of 20 mg [24]. Also, although the half-life of vardenafil is 4–5 h, experience indicates that it is effective for up to 12 h after administration [24]. Likelihood score: E* (unproven but suspected rare cause of clinically apparent liver injury).

• Vardenafil may cause a fainting sensation in some users.
• Stay seated or lying down if dizziness occurs.
• Rise slowly from sitting or lying positions.

While vardenafil has not been associated with hepatotoxicity, its potential for causing hypotension and use in patients with cardiac disease may lead to instances of acute ischemic liver injury. Vardenafil, like the other PDE5 inhibitors, is metabolized in the liver via the cytochrome P450 system (CYP 3A4). While sildenafil and tadalafil have been linked 20 mg vardenafil to rare instances of clinically apparent acute liver injury, vardenafil has not. There is no known cross sensitivity in idiosyncratic adverse effects between vardenafil and the other PDE5 inhibitors currently in use in the United States. However, switching to another PDE5 inhibitor after an episode of clinically apparent liver injury should be done with caution. References to vardenafil induced liver injury are provided in the Overview section on PDE5 Inhibitors. Other Drugs in the Class: Avanafil, Sildenafil, Tadalafil Product labeling at DailyMed, National Library of Medicine, NIH Levitra (vardenafil) remains one of the most recognizable names among erectile dysfunction (ED) medications, yet the brand itself has been marked as officially discontinued in several major markets, including the United States. This discontinuation often leads to confusion, with some users assuming that the drug was removed for safety or efficacy concerns. In reality, the reason is far simpler: business strategy and market dynamics, not medical risk. According to public sources, historical product documentation from Bayer, and legal reporting on FindLaw, the discontinuation of brand-name Levitra reflects a familiar pattern seen across many pharmaceutical markets. Once the patent window closed and generic vardenafil became widely available, brand sales declined rapidly.

• Vardenafil is a medication used to treat erectile dysfunction.
• It works by relaxing blood vessels in the penis.
• Vardenafil is sold under brand names like Levitra.

PDE5 inhibitors also faced increasingly competitive pressure from Cialis and Viagra, whose brand recognition and longer marketing presence dominated the market. Maintaining a brand-name product becomes less economically viable when generics offer the same active ingredient at a fraction of the price. For large pharmaceutical companies, discontinuation under these circumstances is a routine business decision. Importantly, the active ingredient (vardenafil) was not discontinued.

Other uses for this medicine

Vardenafil was administered at a dose of 10 mg twice daily in this study. Phosphodiesterase Type 5 Inhibitors: The Day After2007, European UrologyCitation Excerpt :Initial reports characterised sildenafil and vardenafil as short-acting drugs for up to 4 h. On the other hand, the duration of action of tadalafil was initially reported to be 24 h. Consecutive trials, however, have shown a consistent efficacy of tadalafil for up to 36 h [36]. Clinical experience has shown that the duration of action of both sildenafil and vardenafil far exceeds the 4-h therapeutic window; initial reports on sildenafil and vardenafil have shown that both drugs may be efficacious for 8–12 h after dosing [37,38].

What are the serious side effects of vardenafil?

Until the availability of convincing data, however, the duration of flibanserin sildenafil and vardenafil remains under question. Initial reports characterised sildenafil and vardenafil as short-acting drugs for up to 4 h. On the other hand, the duration of action of tadalafil was initially reported to be 24 h. Consecutive trials, however, have shown a consistent efficacy of tadalafil for up to 36 h [36]. A service of the National Library of Medicine, National Institutes of Health.

Binding of tritiated sildenafil, tadalafil, or vardenafil to the phosphodiesterase-5 catalytic site displays potency, specificity, heterogeneity, and cGMP stimulation

LiverTox®: Clinical and Research Information on Drug-Induced Liver Injury [Internet]. Bethesda (MD): National Institute of Diabetes and Digestive and Kidney Diseases; 2012-. Vardenafil is a selective inhibitor of phosphodiesterase type 5 (PDE5) and is used as therapy of erectile dysfunction. Vardenafil has not been associated with serum aminotransferase elevations nor with clinically apparent liver injury. Vardenafil is effective in prolonging erection and was approved for use in the United States in 2003. Generic vardenafil remains fully available and FDA-, EMA-, and internationally approved. The safety profile of the drug has not changed, and clinical evidence supporting its effectiveness remains robust. In many regions, only the brand name Levitra disappeared from distribution, while generic equivalents remained on pharmacy shelves. Another factor contributing to brand discontinuation is the shift toward telehealth prescribing and online pharmacies, where generics are typically preferred due to lower cost.