The Science Behind Viagra's Mechanism of Action
How Viagra Works in Your Body
Viagra contains sildenafil citrate, a PDE5 inhibitor that works by blocking the phosphodiesterase type 5 enzyme. During sexual arousal, your body naturally releases nitric oxide, which triggers the production of cyclic GMP - a chemical that relaxes blood vessels in the penis. The PDE5 enzyme normally breaks down cyclic GMP, but Viagra prevents this breakdown, allowing blood vessels to remain relaxed and improving blood flow to achieve and maintain an erection.
What to Expect When Taking Viagra
Viagra typically begins working within 30 to 60 minutes of taking the tablet, though this can vary between individuals. The medication requires sexual stimulation to be effective - it will not cause an automatic erection. The effects may last for 4 to 6 hours, meaning you may find it easier to get an erection during this time when sexually aroused. However, this does not mean the erection will last for hours.
Factors That Affect Viagra's Effectiveness
Several factors can influence how well Viagra works for you. Taking the medication on an empty stomach typically results in faster onset of action, whilst fatty meals can delay absorption. Alcohol consumption should be limited as it can reduce the medication's effectiveness and increase the risk of side effects. Your age, overall health, and the underlying cause of your erectile dysfunction may also affect how you respond to treatment.
Dosage and Personalisation
Viagra is available in three strengths: 25mg, 50mg, and 100mg. Most men start with the 50mg dose, which can be adjusted based on effectiveness and tolerability. Your prescriber will consider your medical history, current medications, and individual response to determine the most appropriate dose. The maximum recommended frequency is one tablet per 24-hour period.
Branded Viagra vs Generic Sildenafil
Both branded Viagra and generic sildenafil contain the same active ingredient and work identically. The main difference is cost - generic sildenafil typically costs significantly less whilst providing the same clinical effectiveness. EverydayMeds offers both options, allowing you to choose based on your preference and budget following your clinical assessment.
Safety Considerations and Contraindications
Viagra is not suitable for everyone and requires careful medical assessment. The medication should never be taken with nitrate medications (such as GTN spray) as this can cause a dangerous drop in blood pressure. Men with certain heart conditions, severe liver problems, or those taking specific medications may not be suitable candidates. A thorough medical consultation is essential to ensure Viagra is safe and appropriate for your individual circumstances.
