Levitra's Mechanism of Action Explained

Vardenafil is primarily metabolized by CYP3A4/5; imatinib is a moderate CYP3A4 inhibitor.

• Levitra was one of the first medications introduced for erectile dysfunction.
• Its mechanism involves relaxation of smooth muscle in penile tissue.
• Men should avoid taking Levitra with heavy meals to ensure rapid action.
• The medication’s safety profile is well-documented in scientific literature.
• Levitra may be prescribed alongside other therapies for ED management.
• Regular medical check-ups are recommended during treatment.
• Patients should be aware of potential drug interactions with Levitra.
• Avoid combining Levitra with recreational drugs, especially stimulants.

Indinavir: (Major) Do not use vardenafil orally disintegrating tablets with indinavir due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 24-hour period of vardenafil oral tablets.

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Histrelin: (Moderate) Concomitant use of vardenafil and androgen deprivation therapy (i.e., histrelin) may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Consistent with their known effects on the nitric oxide/cGMP pathway, concomitant use of phosphodiesterase inhibitors and nitrates can cause severe hypotension, syncope, or myocardial infarction. Deaths have been reported in men who were using sildenafil while taking nitrate or nitrite therapy for angina. Hydroxychloroquine: (Major) Concomitant use of hydroxychloroquine and vardenafil increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Hydroxyzine: (Moderate) Concomitant price levitra 10mg use of vardenafil and hydroxyzine may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Vardenafil is primarily metabolized by CYP3A4/5; indinavir is a strong CYP3A4 inhibitor. Inotuzumab Ozogamicin: (Major) Concomitant use of vardenafil and inotuzumab increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Isavuconazonium: (Major) Do not use vardenafil orally disintegrating tablets with isavuconazonium due to increased vardenafil exposure; do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets.

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Itraconazole: (Major) Do not use vardenafil orally disintegrating tablets with itraconazole due to increased vardenafil exposure. Vardenafil is primarily metabolized by CYP3A4/5; itraconazole is a strong CYP3A4 inhibitor.

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Ibutilide: (Major) Concomitant use of vardenafil and ibutilide increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Idelalisib: (Major) Do not use vardenafil orally disintegrating tablets with idelalisib due to increased vardenafil exposure; do not exceed a single dose of 2.5 mg per 24-hour period of vardenafil oral tablets. Vardenafil is primarily metabolized by CYP3A4/5; idelalisib is a strong CYP3A4 inhibitor. Iloperidone: (Major) Concomitant use of vardenafil and iloperidone increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Imatinib: (Major) Do not use vardenafil orally disintegrating tablets with imatinib due to increased vardenafil exposure; do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets. If coadministration of itraconazole and vardenafil oral tablets is required, the maximum single vardenafil dose is 5 mg every 24 hours in patients receiving itraconazole 200 mg daily; for patients receiving itraconazole 400 mg daily, the maximum single vardenafil dose is 2.5 mg every 24 hours. In addition, both itraconazole and vardenafil have been associated with QT prolongation; coadministration may increase this risk.

Aspect	Description
Drug Name	Levitra
Generic Name	Vardenafil
Drug Class	Phosphodiesterase type 5 inhibitor
Approved Uses	Erectile dysfunction

Ketoconazole: (Contraindicated) Avoid concomitant use of ketoconazole and vardenafil due to an increased risk for QT/QTc prolongation and torsade de pointes (TdP).

Related/similar drugs

Eribulin: (Major) Concomitant use of vardenafil and eribulin increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Erythromycin: (Major) Do not use vardenafil orally disintegrating tablets with erythromycin 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 and erythromycin is a moderate CYP3A inhibitor. Coadministration with erythromycin increased the AUC of vardenafil by 4-fold. Escitalopram: (Moderate) Concomitant use of vardenafil and escitalopram may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients.

Drug Interactions

Fedratinib: (Major) Do not use vardenafil orally disintegrating tablets with fedratinib 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 CYP3A4/5; fedratinib is a moderate CYP3A4 inhibitor. The safety and efficacy of combinations of tadalafil and other phosphodiesterase 5 (PDE5) inhibitors, such as vardenafil, has not been studied. Fingolimod: (Moderate) Concomitant use of vardenafil and fingolimod may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Flecainide: (Major) Concomitant use of flecainide and vardenafil increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Concomitant use may also increase the exposure of vardenafil, further increasing the risk for adverse effects, such as hypotension and syncope.

Does Levitra protect against HIV and other sexually transmitted diseases?

Fluconazole: (Contraindicated) Avoid concomitant use of vardenafil and fluconazole due to an increased risk for torsade de pointes (TdP) and QT/QTc prolongation. Concomitant use may also increase vardenafil exposure, further increasing the risk of adverse effects. If concomitant use of fluconazole and vardenafil oral tablets is required, the maximum single dose is 5 mg every 24 hours. Do not use vardenafil orally disintegrating tablets with fluconazole. Vardenafil is primarily metabolized by CYP3A and fluconazole is a moderate CYP3A inhibitor.

Patient Q&A Section about levitra

Fluoxetine: (Moderate) Concomitant use of vardenafil and fluoxetine may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Fluphenazine: (Minor) Use vardenafil with caution in combination with fluphenazine due to increased risk of QT prolongation. Fluphenazine is also associated with a possible risk for QT prolongation. Fluvoxamine: (Major) Do not use vardenafil orally disintegrating tablets with fluvoxamine 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 CYP3A4/5; fluvoxamine is a moderate CYP3A4 inhibitor. If concomitant use of ketoconazole and vardenafil oral tablets is required, the maximum single vardenafil oral tablet dose is 5 mg every 24 hours for patients receiving ketoconazole 200 mg daily and 2.5 mg every 24 hours for patients receiving ketoconazole 400 mg daily.

Aspect	Levitra (Vardenafil)	Sildenafil (Viagra)	Tadalafil (Cialis)
Onset of action	25-30 minutes	30-60 minutes	30-60 minutes
Duration	Up to 4-5 hours	Up to 4 hours	Up to 36 hours
Food interactions	Less affected by food	Delayed if taken after heavy meals	Less affected by food
Side effect profile	Similar to others, with possible visual disturbances	Similar, with some headache	Longer-lasting effect

Do not use vardenafil orally disintegrating tablets (ODTs) with ketoconazole.

• Levitra has been shown to enhance erectile function in clinical studies.
• It is not classified as a controlled substance but still requires caution.
• Side effects usually diminish after the body adjusts to the medication.
• Patients should inform their doctor of all health issues before starting Levitra.
• In some cases, Levitra may be used temporarily or as needed.
• Regular blood pressure monitoring is recommended when using Levitra.
• Levitra should be stored safely away from children and pets.
• Discuss all medication options with a healthcare provider to find the best treatment.

Coadministration with ketoconazole increased the AUC of vardenafil by 10-fold.

What is Levitra?

There may also be an increased risk for QT prolongation and torsade de pointes (TdP) during coadministration. Cases of QT prolongation and TdP have been reported during postmarketing use of fluvoxamine. Both therapeutic and supratherapeutic doses of vardenafil can produce an increase in the QTc interval. Fosamprenavir: (Major) Do not use vardenafil orally disintegrating tablets with fosamprenavir 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; fosamprenavir is a moderate CYP3A inhibitor.

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Foscarnet: (Major) Concomitant use of vardenafil and foscarnet increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Fostemsavir: (Moderate) Concomitant use of vardenafil and fostemsavir may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. The degree of QT prolongation associated with fostemsavir is not clinically significant when administered within the recommended dosage range; QT prolongation has been described at 4 times the recommended daily dose. Gemifloxacin: (Moderate) Concomitant use of vardenafil buy bayer levitra online and gemifloxacin may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Gemtuzumab Ozogamicin: (Moderate) Concomitant use of vardenafil and gemtuzumab ozogamicin may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Lansoprazole; 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.

Drug Profile: Levitra

Gilteritinib: (Moderate) Concomitant use of vardenafil and gilteritinib may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Glasdegib: (Major) Concomitant use of vardenafil and glasdegib increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Goserelin: (Moderate) Concomitant use of vardenafil and androgen deprivation therapy (i.e., goserelin) may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Granisetron: (Moderate) Concomitant use of vardenafil and granisetron may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Grapefruit juice: (Major) Grapefruit and grapefruit juice should be avoided during treatment with vardenafil orally disintegrating tablets due to increased vardenafil exposure; do not exceed a single dose of 5 mg per 24-hour period of vardenafil oral tablets.

Who should not take Cialis:

Vardenafil is primarily metabolized by CYP3A4/5; grapefruit juice is a moderate CYP3A4 inhibitor. Guaifenesin; Phenylephrine: (Minor) The therapeutic effect of phenylephrine injection may be decreased in patients receiving phosphodiesterase inhibitors. Halogenated Anesthetics: (Major) Concomitant use of vardenafil and halogenated anesthetics increases the risk of QT/QTc prolongation and torsade de pointes (TdP). Haloperidol: (Moderate) Concomitant use of vardenafil and haloperidol may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. The intravenous route may carry a higher risk for haloperidol-induced QT/QTc prolongation than other routes of administration. Lapatinib: (Moderate) Concomitant use of vardenafil and lapatinib may increase the risk of QT/QTc prolongation and torsade de pointes (TdP) in some patients. Lefamulin: (Major) Coadministration of lefamulin tablets is contraindicated with vardenafil due to increased vardenafil exposure which may result in QT prolongation and torsade de pointes (TdP).

Study/Survey	Percentage of Effectiveness	Notes
Clinical trial A	76%	Improved erectile function
Real-world survey B	82%	Patient satisfaction
Meta-analysis C	78%	Consistent efficacy