Viagra, or sildenafil citrate, works by increasing blood flow to the penis. This allows men to achieve and maintain an erection sufficient for sexual intercourse. The medication is specifically designed to address erectile dysfunction (ED), a condition affecting millions worldwide. It doesn’t increase libido; rather, it facilitates the physical process of getting an erection when sexual stimulation is present.
How Viagra Works
Viagra inhibits an enzyme called phosphodiesterase-5 (PDE5). PDE5 breaks down cGMP, a molecule crucial for penile blood vessel relaxation. By blocking PDE5, Viagra allows cGMP levels to remain higher, leading to increased blood flow and facilitating erections. This process is triggered only by sexual stimulation; Viagra does not cause spontaneous erections.
Important Considerations
While generally safe and effective, Viagra carries potential side effects. Common side effects include headaches, flushing, nasal congestion, and upset stomach. More serious side effects are rare but include vision changes and hearing loss. Consult your doctor before taking Viagra, especially if you have heart problems, high blood pressure, or are taking other medications. A physician can determine the appropriate dosage and assess your overall health to ensure safe usage. Always follow your doctor’s instructions carefully.
