Viagra Mechanism of Action and Clinical Guidelines
How Viagra Works in the Body
Viagra contains sildenafil citrate, which belongs to a class of medications called PDE5 inhibitors. When sexually aroused, the body naturally produces nitric oxide, which increases levels of cGMP - a chemical that relaxes blood vessels in the penis. Viagra works by blocking the PDE5 enzyme that normally breaks down cGMP, allowing blood vessels to remain dilated and improving blood flow to erectile tissue.
Timing and Effectiveness
Viagra typically begins working within 30-60 minutes of taking the tablet. The medication requires sexual stimulation to be effective - it doesn't cause automatic erections. Effects can last 4-6 hours, though this doesn't mean an erection will persist for this duration. Food, particularly fatty meals, may delay the onset of action. For optimal results, take Viagra on an empty stomach or after a light meal.
Available Doses and Usage Guidelines
Viagra is available in 25mg, 50mg, and 100mg strengths. The typical starting dose is 50mg, which can be adjusted based on effectiveness and tolerability. Only one dose should be taken within a 24-hour period. EverydayMeds offers both branded Viagra and generic sildenafil - both contain the same active ingredient, with sildenafil providing a more cost-effective option.
Safety Considerations and Contraindications
Before starting Viagra, patients must undergo clinical assessment with a UK-licensed prescriber. The medication is contraindicated for men taking nitrate medications (such as GTN spray), those with severe heart conditions, or recent stroke/heart attack history. Blood pressure medications, particularly alpha-blockers, may interact with Viagra and require dose adjustments. Always disclose all current medications during consultation.
Getting Viagra Through EverydayMeds
EverydayMeds provides convenient access to both Viagra and sildenafil following online consultation with qualified prescribers. Our clinical assessment ensures the medication is suitable for your individual health profile. Patients can choose between branded Viagra or generic sildenafil at checkout, both offering the same therapeutic benefits with discreet UK delivery.
