The Science Behind How Viagra Works in Your Body
Understanding PDE5 Inhibition
Viagra works by blocking an enzyme called phosphodiesterase type 5 (PDE5). This enzyme naturally breaks down cyclic guanosine monophosphate (cGMP), a chemical that helps blood vessels in the penis relax and widen. When PDE5 is blocked, cGMP levels increase, allowing improved blood flow during sexual arousal. This mechanism explains why sexual stimulation is still required - Viagra enhances your body's natural response rather than creating an artificial one.
Timeline and Duration of Effects
Most men find Viagra begins working within 30-60 minutes of taking it. The medication reaches peak concentration in your bloodstream after approximately one hour. Effects typically last 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 this timeframe when sexually aroused. Fatty meals can delay absorption, so taking Viagra on an empty stomach may improve effectiveness.
Dosage Options and Effectiveness
Viagra and sildenafil are available in 25mg, 50mg, and 100mg strengths. Most men start with 50mg, which can be adjusted based on effectiveness and any side effects experienced. Only one dose should be taken within a 24-hour period. Your prescriber will determine the most appropriate dose during your consultation, considering factors like your overall health, other medications, and previous responses to ED treatments.
Why Prescription Consultation is Essential
Despite Viagra Connect being available over-the-counter in some strengths, prescription consultation ensures you receive the most appropriate treatment for your individual circumstances. UK-licensed prescribers assess your cardiovascular health, current medications, and medical history to determine safety and optimal dosing. This is particularly important because Viagra can interact dangerously with certain medications, especially nitrates used for heart conditions.
Branded vs Generic Options
Both Viagra (manufactured by Pfizer) and generic sildenafil contain identical active ingredients and work exactly the same way in your body. The main difference is cost - generic sildenafil typically costs significantly less whilst providing equivalent effectiveness. At EverydayMeds, patients can choose between branded Viagra or generic sildenafil during checkout following their consultation, allowing flexibility based on personal preference and budget considerations.
