Viagra, or sildenafil, primarily enhances erections by increasing blood flow to the penis. This happens through the inhibition of a specific enzyme, phosphodiesterase-5 (PDE5). PDE5 normally breaks down cGMP, a molecule crucial for smooth muscle relaxation in the penis. By blocking PDE5, Viagra allows cGMP levels to rise, leading to vasodilation and improved blood flow.
The process starts with sexual stimulation. This triggers the release of nitric oxide, initiating a chain reaction that eventually increases cGMP. Viagra’s effect significantly amplifies this natural process, making it easier to achieve and maintain an erection. It’s important to note that Viagra doesn’t directly cause erections; it facilitates them in response to sexual stimulation.
Optimal results typically appear within 30-60 minutes of ingestion and generally last for four hours. Factors like dosage, individual metabolism, and overall health can influence its effectiveness. Always consult your doctor before using Viagra, especially if you have pre-existing conditions, such as heart problems or high blood pressure. They can assess your suitability and determine the appropriate dosage.
Remember: Viagra is a prescription medication. Self-medicating can be dangerous. Always discuss any potential side effects or concerns with your healthcare provider. They will provide personalized advice based on your individual needs.
