Always inform your doctor about all medications you are currently taking, including over-the-counter drugs, herbal supplements, and vitamins. This includes nitrates, such as nitroglycerin, used to treat chest pain. Combining Vardenafil with nitrates can cause a dangerous drop in blood pressure.
Alpha-blockers, often prescribed for high blood pressure or enlarged prostate, can also interact with Vardenafil, potentially leading to low blood pressure. Your doctor might adjust your dosage or suggest an alternative.
Certain antifungal medications, like ketoconazole and itraconazole, can increase Vardenafil levels in your blood, potentially enhancing side effects. Your doctor may recommend a lower dose of Vardenafil.
CYP3A4 inhibitors, found in some HIV medications and antibiotics, may also increase Vardenafil blood levels. Discuss potential interactions with your physician.
Conversely, CYP3A4 inducers, like rifampin, can decrease Vardenafil’s effectiveness. This requires careful monitoring and potential dosage adjustments.
The following table summarizes key interactions:
| Nitrates | Nitroglycerin | Severe hypotension | Absolutely necessary |
| Alpha-blockers | Terazosin, Doxazosin | Hypotension | Recommended |
| Antifungal medications | Ketoconazole, Itraconazole | Increased Vardenafil levels | Recommended |
| CYP3A4 inhibitors | Ritonavir, Clarithromycin | Increased Vardenafil levels | Recommended |
| CYP3A4 inducers | Rifampin | Decreased Vardenafil effectiveness | Recommended |
This information is not exhaustive. Always consult your doctor or pharmacist before starting or stopping any medication, especially when using Vardenafil.
