How It Works

In healthy volunteers, peak plasma concentrations (Cmax) following administration of a single 20 mg oral tablet

• Levitra is manufactured by Bayer Pharmaceuticals.
• It is available in both tablet and generic forms.
• The drug can be prescribed for men aged 18 and above.
• Levitra's active ingredient is vardenafil hydrochloride.
• It helps achieve erections suitable for sexual activity.
• Taking fatty meals may delay the drug's onset.
• Levitra does not protect against sexually transmitted diseases.
• Use with caution if you have heart conditions.
• It is essential to inform your doctor of all medications.
• Vardenafil does not cure ED; it manages symptoms.

dose are usually reached between 30 minutes and 2 hours (median 60 minutes) in the fasted state.

Overdose/Missed Dose

Vardenafil is primarily metabolized by CYP3A4/5; tucatinib is a strong CYP3A4 inhibitor. Venlafaxine: (Moderate) Concomitant use of vardenafil and venlafaxine may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Verapamil: (Major) Do not use vardenafil orally disintegrating tablets with verapamil due to increased vardenafil exposure; do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets. Vericiguat: (Contraindicated) Use of vericiguat and vardenafil is contraindicated due to the risk of hypotension. PDE5 inhibitors, including vardenafil, may potentiate the hypotensive effects of vericiguat.

How is vardenafil supplied (dosage forms)?

Vigabatrin: (Major) Vigabatrin should not be used with phosphodiesterase inhibitors, which is associated with serious ophthalmic effects (e.g., retinopathy or glaucoma) unless the benefit of treatment clearly outweighs the risks. Voclosporin: (Moderate) Concomitant use of vardenafil and voclosporin may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. The degree of QT prolongation associated with voclosporin is not clinically significant when administered within the recommended dosage range; QT prolongation has been described at 3 times the maximum recommended dose. Vonoprazan; Amoxicillin; Clarithromycin: (Major) Do not use vardenafil orally disintegrating tablets with clarithromycin due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 24-hour period of vardenafil oral tablets. Voriconazole: (Major) Do not use vardenafil orally disintegrating tablets with voriconazole due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 24-hour period of vardenafil oral tablets. High-fat meals reduced Cmax by 18% to 50%.

The onset of action is within 1 hour of administration.Orally disintegrating tablets:The

Bibliographic details

Therapeutic (10 mg) and supratherapeutic (80 mg) doses of vardenafil also produce an increase in QTc interval (e.g., 4 to 6 msec calculated by individual QT correction). Toremifene: (Major) Concomitant use of vardenafil and toremifene increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Trandolapril; Verapamil: (Major) Do not use vardenafil orally disintegrating tablets with verapamil due to increased vardenafil exposure; levitra woman do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets. Vardenafil is primarily metabolized by CYP3A and verapamil is a moderate CYP3A inhibitor. Trazodone: (Major) Concomitant use of vardenafil and trazodone increases the risk of QT/QTc prolongation and torsade de pointes (TdP).

Possible Side Effects of Vardenafil

Triclabendazole: (Moderate) Concomitant use of triclabendazole and vardenafil may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Trifluoperazine: (Minor) Use vardenafil with caution in combination with trifluoperazine as concurrent use may increase the risk of QT prolongation. Trifluoperazine is associated with a possible risk for QT prolongation. Triptorelin: (Moderate) Concomitant use of vardenafil and androgen deprivation therapy (i.e., triptorelin) may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Tucatinib: (Major) Do not use vardenafil orally disintegrating tablets with tucatinib due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 24-hour period of vardenafil oral tablets. orally disintegrating vardenafil tablets provide a higher systemic exposure than the film-coated tablets.

Side Effects

Cyclic guanosine monophosphate causes smooth muscle relaxation in the corpus cavernosum thereby allowing inflow of blood; the exact mechanism by which cGMP stimulates relaxation of smooth muscles has not been determined. Phosphodiesterase type 5 is responsible for degradation of cGMP in the corpus cavernosum. Vardenafil enhances the effect of NO by inhibiting PDE5, thereby raising concentrations of cGMP in the corpus cavernosum. Vardenafil has no direct relaxant effect on isolated human corpus cavernosum and, at recommended doses, has no effect in the absence of sexual stimulation. Vardenafil has a greater selectivity for PDE5 versus PDE6, an enzyme found in the retina and involved in phototransduction.

Non-surgical management of erectile dysfunction

Sildenafil, another PDE inhibitor, has a lower selectivity for PDE5 versus PDE6 and is associated with abnormalities related to color vision with higher doses or plasma concentrations of the drug. The mean steady-state volume of distribution is 208L, indicating extensive distribution throughout the body. Vardenafil and its major metabolite (M1) are highly bound to plasma proteins cost of levitra per pill (approximately 95% for parent drug and M1). Vardenafil is metabolized predominantly in the liver by CYP3A4 (there is some contribution by CYP3A5 and CYP2C isoforms). The major metabolite M1 is the result of desethylation at the piperazine moiety of vardenafil and is further metabolized. In a study of patients with erectile dysfunction, the mean AUC was increased by 21% to 29% and the mean Cmax was

decreased by 19% in geriatric patients and 8% in younger patients

(18 to 45 years) as compared to the 10 mg film-coated tablets. In a study of healthy male volunteers (18 to 50 years), the mean Cmax was

Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews [Internet].

Tacrolimus: (Moderate) Concomitant use of vardenafil and tacrolimus may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Tamoxifen: (Moderate) Concomitant use of tamoxifen and vardenafil may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Tamsulosin: (Moderate) Due to the potential for symptomatic hypotension, patients should be stable on tamsulosin therapy before initiating therapy with the lowest dose of vardenafil. Telavancin: (Moderate) Concomitant use of vardenafil and telavancin may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Terazosin: (Moderate) Due to the potential for symptomatic hypotension, patients should be stable on alpha-blocker therapy before initiating therapy with the lowest dose of vardenafil.

Why was Levitra discontinued?

Tetrabenazine: (Major) Concomitant use of vardenafil and tetrabenazine increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Thioridazine: (Contraindicated) Avoid concomitant use of vardenafil and thioridazine due to an increased risk for torsade de pointes (TdP) and QT/QTc prolongation. Tipranavir: (Major) Do not use vardenafil orally disintegrating tablets with tipranavir boosted with ritonavir due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 72-hour period of vardenafil oral tablets. Tolterodine: (Major) Due to the potential for QT prolongation and torsade de pointes (TdP), caution is advised when administering tolterodine with vardenafil. Tolterodine has been associated with dose-dependent prolongation of the QT interval, especially in poor CYP2D6 metabolizers. 15% higher and the mean AUC was 44% higher compared to the 10 mg film-coated tablets.

Patient characteristics

M1 has phosphodiesterase selectivity similar to that of vardenafil and an in vitro inhibitory potency for phosphodiesterase 5 (PDE5) that is 28% of that of vardenafil. M1 accounts for about 7% of the total pharmacological activity. Vardenafil is excreted as metabolites predominantly in the feces (approximately 91% to 95% of an oral dose) and to a lesser extent in the urine (about 2% to 6% of an oral dose). The elimination half-life of vardenafil and M1 is about 4 to 5 hours with the use of the film-coated tablets. The elimination half-life of vardenafil is 4 to 6 hours and the elimination half-life of MI is 3 to 5 hours with the use of the orally disintegrating tablets.

The international index of erectile function (IIEF): a multidimensional scale for assessment of erectile dysfunction

Affected Cytochrome P450 (CYP450) isoenzymes and drug transporters: CYP3A4, P-glycoprotein (P-gp)Vardenafil is primarily a substrate of CYP3A4. Concomitant use of vardenafil with moderate or strong CYP3A4 inhibitors may require a reduction in vardenafil dosage to reduce the risk of adverse effects. In vitro data suggest that vardenafil may inhibit P-gp at therapeutic doses. While concomitant use of vardenafil did not significantly increase plasma concentrations of digoxin (a P-gp substrate), the effect of vardenafil on plasma concentrations of P-gp substrates more sensitive than digoxin (e.g., dabigatran) is unknown. Oral film-coated tablets:Vardenafil is rapidly absorbed with absolute bioavailability of approximately 15%. The median time to reach Cmax in a fasted stated was 1.5 hours (range: 45 minutes to 2.5 hours).

• Vardenafil Levitra is a prescription medication for erectile dysfunction.
• It works by increasing blood flow to the penis.
• Vardenafil is marketed under the brand name Levitra.
• It typically takes about 25-60 minutes to work.
• The effects of vardenafil last up to 4-5 hours.
• It should be taken on an empty stomach for faster results.
• Common side effects include headache and flushing.
• Vardenafil is contraindicated with nitrates.
• Do not consume alcohol with vardenafil.
• Always follow your doctor's dosage instructions.

High fat meals had no effect on vardenafil AUC or Tmax in healthy volunteers, but reduced the Cmax by 35%.

Key Takeaways

Vardenafil is primarily metabolized by CYP3A4/5; voriconazole is a strong CYP3A4 inhibitor. In addition, voriconazole has been associated with QT prolongation and rare cases of torsade de pointes. Vorinostat: (Moderate) Concomitant use of vardenafil and vorinostat may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Voxelotor: (Major) Do not use vardenafil orally disintegrating tablets with voxelotor due to increased vardenafil exposure; do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets. Vardenafil is primarily metabolized by CYP3A; voxelotor is a moderate CYP3A inhibitor.

Serious Side Effects

Ziprasidone: (Major) Concomitant use of ziprasidone and vardenafil increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Levitra/Staxyn/Vardenafil/Vardenafil Hydrochloride Oral Tab: 2.5mg, 5mg, 10mg, 20mgStaxyn Oral Tab Orally Dis: 10mg liquid levitra For regular tablets (e.g., Levitra), 20 mg/day PO. For orally disintegrating tablets (e.g., Staxyn), 10 mg/day PO. The physiologic mechanism of erection of the penis involves release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation. Nitric oxide then activates the enzyme guanylate cyclase, which results in increased levels of cGMP.