Sildenafil: The Key Ingredient. Sildenafil is the active ingredient in generic Viagra. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. .Discussing expectations, desires, and any concerns you may have can help alleviate anxiety and create a more satisfying sexual experience. Eye problems: Some individuals with retinitis pigmentosa or other eye disorders may experience changes in vision while taking generic Viagra. Proven Effectiveness: The main ingredient in generic Viagra is sildenafil citrate, which has been extensively studied and proven to be effective in treating ED. If flushing becomes bothersome or persists for an extended period, it’s recommended to speak with your doctor. What types of visit can I have?17 hours ago · Viagra, the ‘little blue pill’ that is used by millions of men worldwide for erectile dysfunction, was actually discovered by accident. In the early s, researchers . Sildenafil: The Key Ingredient. Sildenafil is the active ingredient in generic Viagra. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. . These ED medications include sildenafil (Viagra), talafil (Cialis), and vardenafil (Levitra). Please note: This information is for general reference only. Your clinician will review your .However, it’s important to note that individual responses may vary, so it’s advisable to consult with a healthcare professional for personalized guidance. Pros and Cons Like any medication, generic Viagra has its pros and cons when it comes to duration of action: Pros: Generic Viagra typically lasts between 4 and 6 hours, providing an ample window for sexual activity. Do not take more than one dose within a hour period. Flexibility in Dosage Options: Generic Viagra offers various dosage options, allowing individuals to find the most suitable strength for their needs. Nasal Congestion Another common side effect that users may experience when taking generic Viagra is nasal congestion or a stuffy nose. It is important to consider your budget when deciding on the best choice for you.