Certain medications may not be suitable for individuals with specific conditions, and in some cases, a medication may require extra caution during use. Inform your doctor of the following before initiating vardenafil treatment: 

• any disease, injury, or deformity affecting your penis 

• pre-existing heart condition or blood vessel disease 

• history of eye conditions leading to vision loss 

• low blood pressure or angina 

• impairments in liver or kidney function 

• past stroke or heart attack 

• conditions associated with bleeding, such as a stomach ulcer 

• sickle cell disease 

• previous experience with bone marrow cancer or leukaemia 

• use of other medications, including over-the-counter, herbal, complementary, and recreational drugs 

• any history of allergic reactions to medications 

Medication Interactions: You may be unable to take vardenafil if you are currently using medications such as:  

• nitrates (e.g., isosorbide mononitrate, glyceryl trinitrate)  

• some antibiotics (e.g., erythromycin)  

• antifungals (e.g., ketoconazole and itraconazole)  

• antivirals (e.g., ritonavir and saquinavir)  

• alpha-blockers (e.g., tamsulosin, doxazosin, alfuzosin)  

• other erectile dysfunction medications (e.g., Viagra, Levitra, etc.)