Sildenafil Teva
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Viagra (sildenafil citrate) works by blocking the PDE5 enzyme, increasing blood flow to the penis during sexual arousal. Understanding how to track its effectiveness helps optimise treatment outcomes. This guide explains Viagra's mechanism of action, what to expect, and how to monitor results. EverydayMeds offers both branded Viagra and generic sildenafil options through our online consultation service.
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When PDE5 is suppressed, blood is able to flow more freely through the body—including to the (you guessed it) penis.

More blood flow to the penis means harder, more satisfying erections once you're sexually stimulated.
Viagra contains sildenafil citrate, a PDE5 inhibitor that blocks phosphodiesterase type 5 enzymes. When sexually aroused, this allows increased blood flow to the penis by preventing the breakdown of cyclic GMP, a chemical that relaxes smooth muscle in penile blood vessels. This process requires sexual stimulation - Viagra does not cause automatic erections.
Most men experience Viagra's effects within 30-60 minutes of taking the tablet. Peak effectiveness typically occurs 1-2 hours after administration. The medication can remain effective for 4-6 hours, though this does not mean an erection lasts this duration. Fatty meals may delay onset by up to an hour, so taking Viagra on an empty stomach often produces faster results.
The standard starting dose is 50mg, taken approximately one hour before sexual activity. Based on effectiveness and tolerability, your prescriber may adjust this to 25mg or 100mg. Maximum frequency is once per 24 hours. Track your response over several attempts, noting timing, food intake, and effectiveness to help your clinician optimise your treatment plan.
EverydayMeds offers both Viagra (branded by Pfizer) and generic sildenafil tablets. Both contain identical active ingredients and work the same way. The generic version provides the same effectiveness at a lower cost. During checkout, patients can choose between branded Viagra or generic sildenafil based on preference and budget.
Successful treatment varies between individuals. Some men respond well to the first dose, whilst others may need dosage adjustment or several attempts before achieving optimal results. Factors affecting response include underlying health conditions, medications, stress levels, and relationship factors. If Viagra proves ineffective after several attempts at different doses, alternative ED treatments are available.
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