Side Effects of Levitra 20 mg Vardenafil

Thirty-two (32) males (62%) of

the patients completed the trial.

• Levitra 20 mg is used when other doses or forms have been ineffective.
• It can help improve confidence and sexual satisfaction.
• The effectiveness of Levitra depends on correct administration timing.
• Do not take it with fatty meals as absorption may be delayed.
• Always follow your doctor's instructions for use and dosage.
• The medication should not be used by individuals with certain health conditions without consultation.
• Avoid combining Levitra with recreational drugs.
• Stop using immediately if adverse effects occur.
• Keep track of any new or worsened side effects.
• Use only the prescribed dosage; do not increase it on your own.
• Levitra 20 mg should be used responsibly to ensure safety.
• Consult your healthcare professional for questions or concerns.

Retinal function was measured

• Levitra 20 mg can improve erectile response in men.
• Consult your doctor before starting this medication.
• Do not crush or chew the tablet; swallow whole.
• It is not intended for use by women or children.
• Possible side effects include dizziness and nasal congestion.
• Some men may experience vision changes.
• Levitra 20 mg may cause a slow or prolonged erection.
• Notify your doctor if you experience sudden vision loss.
• Do not take Levitra with large amounts of grapefruit.
• Use caution if you have a history of priapism.
• It does not protect against sexually transmitted diseases.
• Missing a dose does not require double dosing.

by ERG and FM-100

How should I use Levitra?

Mean vardenafil plasma concentrations measured after the administration of a single oral dose of 20 mg to healthy male volunteers are depicted in Figure 1. Figure 1: Plasma Vardenafil Concentration (Mean ± SD) Curve for a Single 20 mg LEVITRA Dose Vardenafil is rapidly absorbed with absolute bioavailability of approximately 15%. Maximum observed plasma concentrations after a single 20 mg dose in healthy volunteers are usually reached between 30 minutes and 2 hours (median 60 minutes) after oral dosing in the fasted state. Two food-effect studies were conducted which showed that high-fat meals caused a reduction in Cmax by 18%-50%. The mean steady-state volume of distribution (Vss) for vardenafil is 208 L, indicating extensive tissue distribution.

Clinical Studies

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 of total drug concentrations. Following a single oral dose of 20 mg vardenafil in healthy volunteers, a mean of 0.00018% of the administered dose was obtained in semen 1.5 hours after dosing. 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.

How does vardenafil work (mechanism of action)?

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. The total body clearance of vardenafil is 56 L/h, and the terminal half-life of vardenafil and its primary metabolite (M1) is approximately 4-5 hours. After oral administration, vardenafil is excreted as metabolites predominantly in the feces (approximately 91-95% of administered oral dose) and to a lesser extent in the urine (approximately 2-6% of administered oral dose). test 2, 6 and

24 hours after dosing.

What side effects can this medication cause?

LEVITRA 20 mg caused an additional time-related reduction in blood pressure and increase in heart rate in association with NTG administration. The blood pressure effects were observed when LEVITRA 20 mg was dosed 1 or 4 hours before NTG and the heart rate effects were observed when 20 mg was dosed 1, 4, or 8 hours before NTG. Additional blood pressure and heart rate changes were not detected when LEVITRA 20 mg was dosed 24 hours before NTG. Figure 2: Placebo-subtracted point estimates (with 90% CI) of mean maximal blood pressure and heart rate effects of pre-dosing with LEVITRA 20 mg at 24, 8, 4, and 1 hour before 0.4 mg NTG sublingually. Because the disease state of patients requiring nitrate therapy is anticipated to increase the likelihood of hypotension, the use of vardenafil by patients on nitrate therapy or on nitric oxide donors is contraindicated (see CONTRAINDICATIONS).

Drug Interactions

The effect of 10 mg and 80 mg vardenafil on QT interval was evaluated in a single-dose, double-blind, randomized, placebo- and active-controlled (moxifloxacin 400 mg) crossover study in 59 healthy males (81% White, 12% Black, 7% Hispanic) aged 45-60 years. The QT interval was measured at one hour post dose because this time point approximates the average time of peak vardenafil concentration. The 80 mg dose of LEVITRA (four times the highest recommended dose) was chosen because this dose yields plasma concentrations covering those observed upon co-administration of a low-dose of LEVITRA (5 mg) and 600 mg BID of ritonavir. Of the CYP3A4 inhibitors that have been studied, ritonavir causes the most significant drug-drug interaction with vardenafil. Table 1 summarizes the effect on mean uncorrected QT and mean buy cheapest levitra corrected QT interval (QTc) with different methods of correction (Fridericia and a linear individual correction method) at one hour post-dose.

Key differences between Cialis and Levitra

No single correction method is known to be more valid than the other. In this study, the mean increase in heart rate associated with a 10 mg dose of LEVITRA compared to placebo was 5 beats/minute and with an 80 mg dose of LEVITRA the mean increase was 6 beats/minute. Therapeutic and supratherapeutic doses of vardenafil and the active control moxifloxacin produced similar increases in QTc interval. This study, however, was not designed to make direct statistical comparisons between the drug or the dose levels. The clinical impact of these QTc changes is unknown (see PRECAUTIONS).