Viagra vs Cialis vs Levitra

In this Viagra vs Cialis vs Levitra review we will first look at this debate from the comparative half-life and duration of these popular erectile dysfunction treatments.

Secondly, we will briefly examine the potency and dosage recommendations for all three oral phosphodiesterase type 5 inhibitors.

We will then examine test results in regards to user preferences for Viagra, Cialis and Levitra.

Lastly we announce a winner of the Viagra vs Cialis vs Levitra debate with reservations.

Half-lives of Viagra, Cialis and Levitra phosphodiesterase type 5 inhibitors

Phosphodiesterase type 5 inhibitors, (aka PDE5 inhibitors) are active for disparate duration. This is expressed half-lives.

Cialis is effective for up to 18 hours. In other words, it stays present to some degree in the body for up to 36 hours.

Vardenafil and Sildenafil have a half-life of up to 4 hours.  delivering relief to erectile dysfunction symptoms for at least that long. It remains present in the body for up to 8 hours if a large enough dose for the subject is digested.

The body eliminates all three oral PDE5 inhibitors by means of urination.

The body eliminates PDE5 inhibitors via metabolism.

Metabolite N-desmethyl is the by-product of metabolised Viagra oral PDE5 inhibitor (Sildenafil) which additionally results in PDE5 inhibiting properties. This by-product of Viagra remains around 20% as potent as the initial PDE5 inhibitor Sildenafil.

The metabolite by-product of the PDE5 inhibitor Vardenafil (Levitra) has just a 7% strength of the original PDE5 inhibitor.

Tadalafil , the PDE5 inhibitor used in Cialis, results in no effective substances after breakdown.

Viagra vs Cialis vs Levitra review : PDE5 inhibitor absorption and activation rates

Neither Viagra, Cialis, nor Levitra, activate right after after ingesting. Tests have demonstrated that there is considerable range among all three PDE5 inhibitors. There are also remarkable variations among the men affected in this study.

On average all three PDE5 inhibitors activate between half an hour to one hour after taking. But observable divergence outside these times have been observed.

The pharmaceutical industry claims the time it takes to overcome erectile dysfunction symptoms is 30 to 60 minutes, often less.

In another study, just over 20% of men reported  enjoying erections within 10 minutes after ingesting 10mg of Levitra. The accepted recommendation for Levitra is to take it 25 to 60 minutes prior to intercourse.

The accepted recommendation for Cialis (Tadalafil) is to take it around 30 minutes prior to sexual activity. An alternative result indicated that over 15% of the subjects were able to preform intercourse in around 20 minutes.

Viagra vs Cialis vs Levitra : duration of effectiveness

The PDE5 inhibitors employed in Viagra, Cialis and Levitra have distinct lengths of duration in their effect.

Usual information that ships with Sildenafil (Viagra) and Vardenafil (Levitra) suggest a 4 hour plus time-scale these ED medication’s continued effectiveness.

Tadalafil (Cialis) incorporates a much longer half-life length of 17.5 hours. The effects of Cialis impotence treatments remain active for up to to thirty-six hours.

This length of effectiveness makes Cialis a top selection of erectile dysfunction drug for patients who would like to be able to perform more unplanned sexual activity.

Tests show that all three PDE5 inhibitors reviewed here are beneficial for a broad band of people experiencing ED. Currently there still is a dearth of comparative tests of the ED treatments Viagra, Cialis and Levitra.

We need more direct comparative tests of these oral PDE5 inhibitors under review. Then a definitive judgement of their effectiveness will emerge.

Viagra vs Cialis vs Levitra: potency and success rates

Improvement for erectile dysfunction patients resulting from a 90 day period of ingesting these erectile dysfunction oral PDE5 inhibitors. The tests involved over 100 subjects taking Levitra, 320 men trying Viagra and over 1,000 subjects using Cialis. The results:

Viagra 75% success rate

75% of the test subjects who tried Viagra 50mg had an improvement of erections when sexually aroused over the course of the test. Only 16% of subjects who took a placebo experienced in improvement in their ability to achieve erections when sexually aroused.

Levitra 80% success rate

80% of the men trialing Levitra 20mg over a 3 month test experienced a significant improvement in their capacity for erections when sexually stimulated. Almost 40% of men consumed a placebo experienced erections when sexually stimulated.

The subjects where in their mid-50’s. They had previously suffered various levels of ED ranging from occasional to constant inability to achieve erections.

Cialis 80% success rate

In one other study lasting 90 days testing the potency of Tadalafil PDE5 inhibitor (Cialis), over 80% of the men enjoyed an observable increase in their capacity to have an erect penis sufficient for full penetration.

Of those patients who consumed placebo, 33% percent reported an increase in their capacity to achieve an erect penis.

These observations included men in their fifties who had suffered ED for over 1 year. The level of ED suffered by the men alternated between moderate (40%) to severe (60%).

The study did not use lab test subjects who had previously failed to respond to PDE5 inhibitors.

Instructors asked in the trials of this Viagra vs Cialis vs Levitra review: Was your erection of adequate hardness and duration to engage in penetrative intercourse?

A positive response to this question was 65% for Viagra and Levitra, and 68% for Tadalafil.

Viagra vs Cialis vs Levitra review: aims and preferences

The main aim of ED pills such as Viagra, Cialis and Levitra is to facilitate sufficient capability for achieving penile erections when stimulated and the capacity to achieve a fuller and more rewarding sexual life.

Doctors must acknowledge the requirements and distinct preferences of the individual when making available impotence medication.

The rate of response and results of the three major PDE5 inhibitors are more or less the same. It is important to note the choices of the patient prior to making a course of action.

Viagra vs Cialis: the reasons men prefer Cialis over Viagra

Adouble-blind crossover study measured patient preference between Cialis and Viagra. 200 patients participated. The strengths were a variable amount of Viagra (between 25mg to 100mg) and 20mg of Cialis.

Men taking Viagra started on 50mg with the option to up the dose later.

Instructions regarding effect durability for Viagra and Cialis are different. The use of placebos mimicking both PDE5 inhibitor guidelines ensured blindness.

Also a random selection of Viagra and Cialis with a 12 week exchange from one to the other. By the end of the experiment there were 180 patients who could  make a choice over which ED treatment they preferred.

Approximately 70% of the subjects chose Cialis vs Viagra as their preferred erectile dysfunction treatment.

Lab tests continue

An additional lab study used subjects experimenting with strengths of Viagra between 25mg to 100mg for 6 weeks. Later switching to Cialis at a standard dose of 20mg.

This study attempted to mimic standard laboratory practice. The resulting figures showed definitively that around 90% of the men preferred Cialis vs Viagra.

There was another study in Ireland to document the preference for Viagra vs Cialis. Over 300 subjects were involved. The study over 12 weeks for each PDE5 inhibitor.

The initial 8 weeks trying either Cialis or Viagra was the dose optimization phase. Patients chose the most appropriate dosage for each PDE5 inhibitor.

The patients started off with with 25mg or 50mg of Viagra. They were allowed to increase the dosage to 100mg if they desired. The test subjects also began with 10mg of Tadalafil. They were allowed to up the dosage to 20mg if they chose to.

Test result have similar findings

After the 12 week experiment phases with Viagra vs Cialis was completed. The subjects were offered a choice on which erectile dysfunction pill they wished to stay with. 30% of the subjects wished to continue with Viagra and 70% selected to stay with Cialis.

The patient’s decisions did not appear to be influenced by the order of testing, level of ED suffered beforehand, or the patient’s age or strength of PDE5 inhibitor selected.

3% of the test subjects quit due to negative side effects. 0.7% quit the test study because of an absence of any noticeable beneficial result.

These trials amply show that patients choose their favourite ED tablets founded on effects experienced. However approaches in these tests of ED treatments might introduce bias in choosing in the test subjects.

Technical problems were observed. To name a few:

• gaps in blindness,
• sequence order of crossover,
• numerous dosage strengths
• changing guidelines.

The guidelines for use varied due to the differences in length of effect as well as the influence of some kinds of food upon the effectiveness of Viagra and Cialis.

Scientists issued user guidelines appropriate to the subjects for the erectile dysfunction treatment tested (Viagra or Cialis). It is highly unlikely there was any distortion in results due to the methodology of this Viagra vs Cialis review.

This lab study accounted for possible discrimination. More thorough tests are under way to clearly identify ED sufferer’s preference of the 3 major PDE5 inhibitors. Namely, Viagra vs Cialis vs Levitra.

Viagra vs Cialis vs Levitra comparisons: conclusions

It is no longer difficult to order Viagra, Cialis and Levitra. Cost have lowered additionally.

The easy availability of cheap generic Cialis online as well as other erectile dysfunction tablets have notably put these effective impotence cures within the reach of most men.

The 3 most popular PDE5 inhibitors are an inexpensive cure for ED. Mindful that the effects remain for a much longer duration, Cialis is clearly the ED treatment with greatest value. This is especially true if the impotence sufferer wants ED treatments for the long-term.

When it comes to erectile dysfunction drugs, PDE5 inhibitors continue to be the most effective. They are simple to administer, and cost-effective. The 3 main PDE5 inhibitors, Sildenafil, Tadalafil and Vardenafil, usually marketed as Viagra,Cialis and Levitra, enjoy many identical characteristics. All 3 area effective and well-tolerated by the majority of users.

The medical establishment can then assure that every ED sufferer derives the most benefits.

Admittedly, this Viagra vs Cialis vs Levitra review covers a wide area of contention which is seemingly endless. However, Cialis maintains the lead in the battle of ED pills.

Nevertheless,  sometimes Levitra and Viagra might be more successful than Cialis in curing erectile dysfunction.