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Erectile dysfunction (ED) is a condition in which men have difficulty achieving or maintaining an erection despite sexual stimulation. It is a common health problem experienced by many men worldwide, and its incidence tends to increase with age. The most widely used ED treatments are PDE5 inhibitors. Representative medications include sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). These drugs work by increasing blood flow to the penis to help achieve an erection. Each drug has different durations of action. Sildenafil and vardenafil last approximately 4-5 hours, while tadalafil can last up to 36 hours, earning it the nickname "weekend pill." Precautions for Use: Erectile dysfunction medications require a doctor's prescription. If you have cardiovascular disease or are taking nitrate medications, you should consult a doctor as these medications can be dangerous. Common side effects include headache, facial flushing, indigestion, and nasal congestion, but these are usually mild and temporary. In rare cases, if you experience visual disturbances or an erection lasting more than four hours, you should seek immediate medical attention. The importance of a healthy lifestyle: Erectile dysfunction medications are merely symptomatic treatment tools, not a cure. Maintaining a healthy lifestyle, including regular exercise, a balanced diet, quitting smoking, and moderating alcohol consumption, is crucial for preventing and improving erectile dysfunction. It's also crucial to manage underlying conditions like diabetes and high blood pressure. How to Purchase Erectile Dysfunction Medication