How Sildenafil Works: The Science Behind ED Treatment
The Mechanism Behind Sildenafil's Effectiveness
Sildenafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. When sexually aroused, the body naturally produces nitric oxide, which increases levels of a chemical called cyclic GMP. This process relaxes blood vessel walls in the penis, allowing increased blood flow that creates an erection. The PDE5 enzyme naturally breaks down cyclic GMP, ending the erection.
Sildenafil works by temporarily blocking the PDE5 enzyme, allowing cyclic GMP levels to remain elevated for longer periods. This enhanced blood flow response helps men with ED achieve and maintain erections when sexually stimulated. Importantly, sildenafil does not cause automatic erections - sexual arousal is still required for the medication to be effective.
Choosing Between Viagra and Generic Sildenafil
EverydayMeds offers both branded Viagra and generic sildenafil options, allowing patients to choose based on their preferences and budget. Both contain the same active ingredient (sildenafil citrate) and work identically in the body. The main differences are price and packaging - generic sildenafil typically costs significantly less than branded Viagra whilst providing the same clinical effectiveness.
Both options are available in 25mg, 50mg, and 100mg strengths. Most men start with 50mg, which can be adjusted up to 100mg or down to 25mg based on effectiveness and tolerability. Your prescriber will recommend the most appropriate starting dose during your online consultation.
What to Expect When Taking Sildenafil
Sildenafil typically begins working within 30-60 minutes of taking the tablet. The medication's effects can last 4-6 hours, though this doesn't mean an erection will persist - normal erection and detumescence patterns continue with sexual activity and rest periods. Taking sildenafil with fatty meals may delay its onset of action, so consider timing around food intake.
The medication requires sexual stimulation to work effectively. Many men find that reducing performance anxiety and maintaining realistic expectations helps optimise treatment outcomes. Sildenafil should be taken a maximum of once per 24-hour period, regardless of whether sexual activity occurs.
Eligibility and Safety Considerations
Sildenafil requires a prescription following consultation with a UK-licensed prescriber. EverydayMeds' online clinical assessment evaluates your medical history, current medications, and cardiovascular health to ensure safe prescribing. The medication is suitable for adult men with ED but has important contraindications.
Men taking nitrate medications (such as GTN spray for angina) cannot safely use sildenafil due to potentially dangerous blood pressure interactions. Those with severe heart disease, recent heart attacks or strokes, severe liver problems, or very low blood pressure may also be advised against sildenafil use. The online consultation process identifies these safety concerns before prescribing.
Maximising Treatment Success
Several factors can influence sildenafil's effectiveness. Maintaining good cardiovascular health through regular exercise, healthy diet, and avoiding excessive alcohol consumption may improve outcomes. Limiting alcohol intake around the time of taking sildenafil is particularly important, as alcohol can interfere with the medication's effectiveness and increase side effect risks.
Open communication with your prescriber about treatment response helps optimise dosing and timing. Some men require dose adjustments or alternative approaches if initial treatment doesn't provide desired results. EverydayMeds' follow-up consultations allow for treatment refinement based on your individual response and any side effects experienced.
