Viagra vs Levitra vs Cialis

Viagra vs Cialis vs Levitra Comparison

A comparative analysis of popular ED pills sold as Viagra, Levitra and Cialis

Half-lives of ED pills based on PDE5 inhibitors Tadalafil (Cialis), Sildenafil (Viagra) and Vardenafil (Levitra)

PDE5 inhibitors stay in effect for various lengths of time expressed half-lives. Tadalafil (Cialis) stays effective for 18 hours. It remains effective for 36 hours. Vardenafil (Levitra) and Sildenafil (Viagra) incorporate a half-life duration of approximately 4 hours. It remains effective around 8 hours.

Urination eliminates all three PDE5 blockers from the patient.

ED pills price comparison

PDE5 blockers are eliminated from the blood by route of metabolism. Metabolite N-desmethyl is the chemical of metabolised Sildenafil which also displays PDE5 inhibiting qualities. This product of Sildenafil-based Viagra remains approximately 20 percent potent as the original oral phosphodiesterase type 5 inhibitor Viagra.

The metabolite by-product of Vardenafil-based Levitra has in comparison just a 7% effectiveness of the initial phosphodiesterase type 5 inhibitor.

Tadalafil-based Cialis demonstrates no effective metabolites post breakdown.

Viagra vs Levitra vs Cialis time delay before becoming active

Neither Cialis, Viagra nor Levitra activate right after ingesting. Tests have demonstrated that there remains considerable variation between all 3 main ED tablets and also considerable variations among the patients in this regard.

On average the 3 phosphodiesterase type 5 inhibitors activate somewhere between half an hour to one hour after ingestion. Lab studies show a significant divergence beyond these times parameters.

Consultants often regard the anticipated delay between taking Viagra and its activation is 60 minutes.

Nevertheless, 1 test demonstrated that with particular test subjects the effectiveness of Viagra took 15 minutes by just over 30% of subjects.

In results from one laboratory study, just over 20% of men taking Levitra 10mg reported substantial erections within 10 minutes. Guidelines suggest taking Levitra 25 to 60 minutes prior to penetration.

Guidelines state 30 minutes to activate Cialis. 1 study revealed that almost 20% experienced erections in around 20 minutes.

Duration of activation of Viagra vs Levitra vs Cialis

All ED tablets currently in use have different durations in their effectiveness. Standard advice supplied with Levitra and Viagra ED tablets suggest a 4 hour plus length of time of effectiveness.

The popular ED tablet Cialis conversely incorporates a half-life duration of 17.5 hours. Therefore the effects of Cialis remains effective for around to 35 hours. This makes Cialis a top choice men seeking more spontaneous sexual activity.

Lab tests show that the 3 ED tablets discussed here are useful for a broad band of ED.

Tests regarding potency of the 3 ED tablets under review

There was a beneficial change for ED patients arising from a 3 month period of trying these ED tablets. Tests comprised over 100 subjects taking Levitra. 320 patients using Viagra. 1,034 subjects taking Cialis. Below are the results:

Three-quarters of the men who consumed 50mg of Viagra experienced an improvement of erections when aroused during the test whereas 16% of patients who took a placebo experienced erections when sexually stimulated.

With regards to subjects who took 20mg of Levitra during a three month 90 day period, over 80% experienced an noticeable improvement in overcoming ED. In the same test almost 40% of patients tried a placebo reported an improvement when stimulated.

All the men of these experiments where in their mid-fifties age bracket and had previously suffered levels of erectile dysfunction from mild to severe for up to 5 years beforehand.

In one other study lasting 90 days testing the potency of Cialis, 84% of subjects experienced an observable improvement in their capacity to achieve an erection capable of copulation. Of those patients who ingested placebo, 33% experienced an increase in their ability to have an erection.

These studies included men in their late fifties who had suffered erectile dysfunction for over a year. The degree of erectile dysfunction suffered by the subjects ranged from moderate (40%) to extreme (60%).

Study patients who had failed in the past to respond to either Viagra, Levitra or Cialis were excluded from these trials.

After the studies examined above it was more directly asked – were erections experienced of adequate hardness and lasted long enough to have sexual intercourse? The answer ‘yes’ to this question was 65% for Viagra and Levitra, and 68% positive for Cialis.

Viagra, Levitra and Cialis aims and choices

The primary aim of ED pills like Cialis, Levitra and Viagra is to enable sufficient erectile function when sexually aroused and ability to enjoy a full and satisfying sex experiences. Therefore the requirements and distinct preferences of the individual must be taken into account when defining the results of the Viagra vs Levitra vs Cialis debate.

Given that the rate of response and results of the 3 major ED pills, Viagra, Levitra and Cialis are similar, the choices of the patient should be acknowledged before considering a course of action.

To find out the clear winner when head to head tests between Viagra and Cialis see: Viagra vs Cialis test results