Understanding How Viagra Works in Your Body
The Science Behind Viagra's Mechanism
Viagra contains sildenafil citrate, which belongs to a class of medicines called PDE5 inhibitors. When sexually aroused, your body naturally releases nitric oxide, which increases blood flow to the penis. The PDE5 enzyme normally breaks down this process. Viagra works by blocking PDE5, allowing increased blood flow to continue, making it easier to achieve and maintain an erection during sexual activity.
Timing and Duration of Effects
Viagra typically begins working within 30-60 minutes of taking it, though this can vary between individuals. The effects may last 4-6 hours, but this doesn't mean you'll have an erection for this entire period. Sexual stimulation is still required for the medication to work effectively. Taking Viagra with a heavy or fatty meal may delay its onset of action.
Dosage Guidelines and Options
Most men start with a 50mg dose, taken approximately one hour before sexual activity. Depending on effectiveness and any side effects experienced, your prescriber may adjust this to 25mg or increase to 100mg. Only take one dose within a 24-hour period. EverydayMeds provides both branded Viagra and generic sildenafil options, giving you choice at checkout while maintaining the same active ingredient and effectiveness.
Safety Considerations and Contraindications
Viagra is not suitable for everyone. Men taking nitrate medications for heart conditions should never use Viagra due to dangerous interactions that can cause severe drops in blood pressure. Those with recent heart attacks, strokes, severe liver problems, or very low blood pressure should also avoid this medication. A clinical assessment with a UK-licensed prescriber is required to ensure Viagra is safe for your individual circumstances.
What to Expect When Taking Viagra
Common side effects may include headaches, facial flushing, indigestion, or nasal congestion. These are usually mild and temporary. Viagra doesn't affect your sexual desire or cause spontaneous erections - arousal and stimulation are still necessary. If you experience an erection lasting more than 4 hours or sudden vision changes, seek immediate medical attention.
