Understanding Viagra's Mechanism of Action
How Viagra Functions in the Body
Viagra contains the active ingredient sildenafil citrate, which belongs to a class of medicines called PDE5 inhibitors. When a man becomes sexually aroused, the body naturally releases nitric oxide in the penis, which helps relax blood vessels and increase blood flow. However, an enzyme called phosphodiesterase type 5 (PDE5) can break down this process too quickly, preventing sufficient blood flow for an erection.
Viagra works by temporarily blocking the PDE5 enzyme, allowing the blood vessels in the penis to remain relaxed for longer periods. This enhanced blood flow helps men with erectile dysfunction achieve and maintain an erection suitable for sexual activity. It's important to understand that Viagra does not cause automatic erections - sexual stimulation is still required for the medication to be effective.
Timing and Duration of Effects
Most men find that Viagra begins working within 30 to 60 minutes of taking the tablet. However, this timing can be affected by various factors, including food consumption. Taking Viagra with a large or high-fat meal may delay its onset of action, so many healthcare providers recommend taking it on an empty stomach or after a light meal for optimal results.
The effects of Viagra can last for approximately 4 to 6 hours, though this doesn't mean an erection will persist for this entire duration. Rather, it means the medication remains active in your system, potentially making it easier to achieve erections during this timeframe when sexually aroused. After this period, the medication is gradually eliminated from the body.
Dosage Options and Personalisation
Viagra is available in three strengths: 25mg, 50mg, and 100mg tablets. Healthcare providers typically start patients on a 50mg dose, which can then be adjusted based on effectiveness and any side effects experienced. Some men may find that 25mg is sufficient for their needs, whilst others may require the 100mg strength for optimal results.
It's crucial to take only one dose within a 24-hour period, regardless of the strength prescribed. The medication should be taken approximately 30-60 minutes before planned sexual activity. At EverydayMeds, patients can choose between branded Viagra or generic sildenafil during checkout - both contain the same active ingredient and work identically, with sildenafil offering a more cost-effective alternative.
Safety Considerations and Consultation Process
Before prescribing Viagra, healthcare providers must assess whether it's safe for each individual patient. This involves reviewing cardiovascular health, current medications, and medical history. Viagra is not suitable for men taking nitrate medications (such as GTN spray) due to potentially dangerous interactions that can cause severe drops in blood pressure.
At EverydayMeds, all patients undergo a comprehensive online consultation with UK-licensed prescribers who evaluate eligibility and determine the most appropriate treatment plan. This ensures that Viagra is prescribed safely and effectively for each individual's specific circumstances.
