After oral administration, vardenafil is excreted as metabolites predominantly in the feces (approximately 91 to 95% of administered oral dose) and to a lesser extent in the urine (approximately 2 to 6% of administered oral dose).

Side Effects

The total time to angina was not altered by vardenafil when compared to placebo (10 mg vardenafil vs. placebo: 291±123 and 292±110 seconds; 20 mg vardenafil vs. placebo: 354±137 and 347±143 seconds, respectively). The total time to 1 mm or greater ST-segment depression was similar to placebo in both the 10 mg and the 20 mg vardenafil groups (10 mg vardenafil vs. placebo: 380±108 and 334±108 seconds; 20 mg vardenafil vs.

Chapter 39

placebo: 364±101 and 366±105 seconds, respectively). Single oral doses of phosphodiesterase inhibitors have demonstrated transient dose-related impairment of color discrimination (blue/green) using the Farnsworth-Munsell 100-hue (FM-100) test and reductions in electroretinogram (ERG) b-wave amplitudes, with peak effects near the time of peak plasma levels. These findings are consistent with the inhibition of PDE6 in rods and cones, which is involved in phototransduction in the retina. The findings were most evident one hour after administration, diminishing but still present 6 hours after administration. In a single dose study in 25 normal males, vardenafil (film-coated tablets) 40 mg, twice the maximum daily recommended dose, did not alter visual acuity, intraocular pressure, fundoscopic and slit lamp findings. Vardenafil is a high clearance drug with a plasma clearance of 56.4 L/h following intravenous administration.

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Pediatrics Vardenafil hydrochloride orally disintegrating tablets are not indicated for use in pediatric patients.

Vardenafil must be stored in a cool, dry place away from children.
Do not exceed the recommended dose to prevent serious side effects.
Alcohol can reduce vardenafil’s effectiveness and increase risk.
Consult your healthcare provider if you experience prolonged erections.
Vardenafil does not improve sexual desire, only performance.
Prescription requirements make buying vardenafil in Canada secure legally.

Vardenafil trials were not conducted in the pediatric population.

Not the study for you?

In another double-blind, placebo-controlled clinical trial, at least 15 doses of 20 mg vardenafil were administered over 8 weeks versus placebo to 52 males. Thirty-two (32) males (62% of the patients) completed the trial. Retinal function men enhancement pills was measured by ERG and FM-100 test 2, 6 and 24 hours after dosing. The trial was designed to detect changes in retinal function that might occur in more than 10% of patients. Vardenafil did not produce clinically significant ERG or FM-100 effects in healthy men compared to placebo.

What should I do if I accidentally take too much vardenafil?

Two patients on vardenafil in the trial reported episodes of transient cyanopsia (objects appear blue). There was no effect on sperm motility or morphology after single 20 mg oral doses of vardenafil film-coated tablets in healthy volunteers. The pharmacokinetics of vardenafil and its M1 metabolite from vardenafil hydrochloride orally disintegrating tablets have been evaluated in healthy male volunteers (18 to 50 years) and in young (18 to 45 years) and elderly (≥ 65 years) erectile dysfunction patients. Studies have shown that vardenafil hydrochloride orally disintegrating tablets provides higher systemic exposure of vardenafil compared to vardenafil 10 mg film-coated tablets. Mean vardenafil plasma concentrations measured after the administration of a single oral dose vardenafil hydrochloride orally disintegrating tablets to patients with erectile dysfunction (18 to 45 years) are depicted in Figure 8. Geriatrics Vardenafil AUC and Cmax in elderly patients (65 years or older) taking vardenafil hydrochloride orally disintegrating tablets were increased by 39% and 21%, respectively, in comparison to patients aged 45 years and below [see Use in Specific Populations (8.5)].

The Mechanism of Action: How Vardenafil and Levitra Work

Figure 8: Vardenafil Plasma Concentration (Mean ± SD) Profile for Vardenafil Hydrochloride Orally Disintegrating Tablets in men age 18to 45 years with erectile dysfunction The median time to reach Cmax (Tmax) in patients receiving vardenafil hydrochloride orally disintegrating tablets in the fasted state was 1.5 h [range: 0.75 to 2.5 h]. After administration of vardenafil hydrochloride orally disintegrating tablets to elderly (≥ 65 years) and young (18 to 45 years) patients with erectile dysfunction, mean vardenafil AUC was increased by 21 to 29%, respectively while mean Cmax was lower by 19% and 8%, respectively, in comparison to 10 mg vardenafil (film-coated tablets). In a study of healthy male volunteers (18 to 50 years), the mean Cmax and AUC of vardenafil from vardenafil hydrochloride orally disintegrating tablets were higher by 15% and 44%, respectively compared to 10 mg vardenafil film-coated tablets. Vardenafil was not found to accumulate in plasma when vardenafil hydrochloride orally disintegrating tablets was dosed daily over ten days. Effect of food: A high fat meal had no effect on vardenafil AUC and Tmax from vardenafil hydrochloride orally disintegrating tablets in healthy volunteers and reduced Cmax by 35%.

Potential Interactions: What to Watch Out For:

Clinical trials for vardenafil hydrochloride orally disintegrating tablets were conducted without regard to meals. Effect of water: When vardenafil hydrochloride orally disintegrating tablets were swallowed with water, the AUC of vardenafil was reduced by 29% and median Tmax was shortened by 60 minutes while Cmax was not affected. In clinical trials, dosing was done without water. Vardenafil hydrochloride orally disintegrating tablets should be taken without liquid. Distribution The mean steady-state volume of distribution (Vss) for vardenafil is 208 L, indicating extensive tissue distribution. Hepatic Impairment In volunteers with mild hepatic impairment (Child-Pugh A), the Cmax and AUC following a 10 mg vardenafil (film-coated tablets) dose were increased by 22% and 17%, respectively, compared to healthy control subjects.

The approval process in Canada includes rigorous safety and efficacy tests.
Some pharmacies offer vardenafil under different brand names in Canada.
Online reviews can help verify reputable Canadian vendors.
Cost savings on vardenafil in Canada attract many international buyers.
It is important to compare prices and check for verified sources.
Canadian health authorities regulate the sale of erectile dysfunction medications.

Vardenafil has not been evaluated in patients with severe (Child-Pugh C) hepatic impairment [see Dosage and Administration (2.3), Warnings and Precautions (5.8), and Use in Specific Populations (8.6).] Renal Impairment In volunteers with mild renal impairment (CLcr = 50 to 80 mL/min), the pharmacokinetics of vardenafil were similar to those observed in a control group with normal renal function.

Order Delivery Guide

The clinical impact of these QTc changes is unknown [see Warnings and Precautions (5)]. In a separate postmarketing study of 44 healthy volunteers, single doses of 10 mg vardenafil (film-coated tablet) resulted in a placebo-subtracted mean change from baseline of QTcF (Fridericia correction) of 5 msec (90% CI: 2,8). Single doses of gatifloxacin 400 mg resulted in a placebo-subtracted mean change from baseline QTcF of 4 msec (90% CI: 1,7). When vardenafil 10mg (film-coated tablets) and gatifloxacin 400 mg were co-administered, the mean QTcF change from baseline was additive when compared to either drug alone and produced a mean QTcF change of 9 msec from baseline (90% CI: 6,11). The clinical impact of these QT changes is unknown [see Warnings and Precautions (5.7)].

Chapter 21

Effects on Exercise Treadmill Test in Patients with Coronary Artery Disease (CAD) In two independent trials that assessed 10 mg (n=41) and 20 mg (n=39) vardenafil (film-coated tablets), respectively, vardenafil did not alter the total treadmill exercise time compared to placebo. The patient population included men aged 40 to 80 years with stable exercise-induced angina documented by at least one of the following: 1) prior history of myocardial infarction (MI), coronary artery bypass graft (CABG), percutaneous transluminal coronary angioplasty (PTCA), or stenting (not within 6 months); 2) positive coronary angiogram showing at least 60% narrowing of the diameter of at least one major coronary artery; or 3) a positive stress echocardiogram or stress nuclear perfusion study. Results of these studies showed that vardenafil did not alter the total treadmill exercise time compared to placebo (vardenafil 10 mg vs. placebo: 433±109 and 426±105 seconds, respectively; 20 mg vardenafil vs. placebo: 414±114 and 411±124 seconds, respectively). Vardenafil pharmacokinetics have not been evaluated in patients requiring renal dialysis [see Dosage and Administration (2.3), Warnings and Precautions (5.9), and Use in Specific Populations (8.7)]. Vardenafil was not carcinogenic in rats and mice when administered daily for 24 months.

Vardenafil may cause a drop in blood pressure in some users.
Always consult a healthcare provider in case of unusual symptoms.
It is not a cure for erectile dysfunction but a treatment aid.
Avoid combining vardenafil with recreational drugs like amyl nitrite.
The drug’s effects can be influenced by age and health condition.
Proper storage extends the shelf life and maintains drug potency.

In these studies systemic drug exposures (AUCs) for unbound (free) vardenafil and its major metabolite were approximately 400- and 170-fold for male and female rats, respectively, and 21-and 37-fold for male and female mice, respectively, the exposures observed in human males given the maximum recommended human dose (MRHD) of 20 mg.

Buying vardenafil online from Canada can be cost-effective and discreet.
Generic vardenafil offers a cheaper alternative with similar effectiveness.
The medication’s effectiveness depends on proper timing and dosage.
Canadian regulations ensure the quality and safety of vardenafil sold locally.
Male enhancements are the primary use of vardenafil in Canada.
Vardenafil does not protect against sexually transmitted diseases.

Vardenafil was not mutagenic as assessed in either the in vitro bacterial Ames assay or the forward mutation assay in Chinese hamster V79 cells.

Comparing Vardenafil and Levitra: Efficacy and Side Effects

Vardenafil and its major circulating metabolite, M1, are highly bound to plasma proteins (about 95% for parent drug and M1). This protein binding is reversible and independent fildena purple pill of total drug concentrations. Following a single oral dose of 20 mg vardenafil film-coated tablet in healthy volunteers, a mean of 0.00018% of the administered dose was obtained in semen 1.5 hours after dosing. 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.

Chapter 77

The plasma concentration of M1 is approximately 26% that of the parent compound. This metabolite shows a phosphodiesterase selectivity profile similar to that of vardenafil and an in vitro inhibitory potency for PDE5 28% of that of vardenafil. Therefore, M1 accounts for approximately 7% of total pharmacologic activity. Excretion The mean terminal half-life of vardenafil in patients receiving vardenafil hydrochloride orally disintegrating tablets varied between about 4 to 6 hours. The elimination half-life of the metabolite M1 is between 3 to 5 hours. Vardenafil did not impair fertility in male and female rats administered doses up to 100 mg/kg/day for 28 days prior to mating in males, and for 14 days prior to mating and through day 7 of gestation in females. In a corresponding 1-month rat toxicity study, this dose produced an AUC value for unbound vardenafil 200 fold greater than AUC in humans at the MRHD of 20 mg.

Purchase Method	Required Documentation	Delivery Time	Price Comparison (CAD)
Local Pharmacy	Prescription	Same day	$20 - $50 per tablet
Online Pharmacy	Valid prescription needed	3-7 days	$10 - $40 per tablet
International Order	Prescription, customs info	2-4 weeks	Varies widely