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How Viagra Works: The Science Behind Blood Flow
The Biological Mechanism of Viagra
Viagra works by targeting a specific enzyme called phosphodiesterase type 5 (PDE5). When you become sexually aroused, your body naturally releases nitric oxide, which increases levels of a chemical messenger called cyclic GMP. This process relaxes the smooth muscles in blood vessels leading to the penis, allowing increased blood flow that creates an erection.
However, the PDE5 enzyme breaks down cyclic GMP, which can prevent or reduce erections. Viagra blocks this enzyme, helping to maintain higher levels of cyclic GMP and supporting improved blood flow when you're sexually stimulated. This is why sexual arousal is still necessary - Viagra enhances your body's natural response rather than creating an automatic erection.
What to Expect When Taking Viagra
Most men notice Viagra begins working within 30-60 minutes of taking the tablet. The medication typically remains active in your system for 4-6 hours, though this doesn't mean you'll have an erection for this entire period. Instead, it means you may find it easier to achieve and maintain erections during sexual activity within this timeframe.
Food can affect how quickly Viagra works, particularly heavy or fatty meals, which may delay absorption. For optimal results, consider taking Viagra on an empty stomach or after a light meal. EverydayMeds offers both branded Viagra and generic sildenafil in 25mg, 50mg, and 100mg strengths, with 50mg being the typical starting dose.
Effectiveness and Individual Response
Clinical studies show that Viagra helps approximately 7 out of 10 men with erectile dysfunction achieve erections suitable for sexual activity. However, effectiveness can vary based on individual factors including age, underlying health conditions, psychological factors, and other medications you may be taking.
Some men may find the generic sildenafil equally effective as branded Viagra, as both contain the same active ingredient. The choice between branded and generic options often comes down to personal preference and cost considerations, with generic sildenafil typically offering significant savings whilst maintaining the same therapeutic benefits.
Important Considerations Before Taking Viagra
Viagra isn't suitable for everyone and requires a prescription following consultation with a healthcare professional. It's particularly important to discuss your cardiovascular health, as the medication can interact dangerously with certain heart medications, especially nitrates used for chest pain. Your prescriber will assess whether Viagra is safe based on your medical history and current medications.
At EverydayMeds, our UK-licensed prescribers conduct thorough online consultations to ensure Viagra or sildenafil is appropriate for your individual circumstances. This assessment helps determine the right starting dose and identifies any potential contraindications or drug interactions that could affect your safety.
