How Viagra Works and Clinical Information
Understanding Viagra's Mechanism of Action
Viagra belongs to a class of medicines called PDE5 inhibitors. It works by blocking the phosphodiesterase type 5 enzyme, which increases blood flow to the penis during sexual arousal. It's important to understand that Viagra does not cause automatic erections - sexual stimulation is still required for the medication to be effective.
Available Dosages and Administration
Viagra is available in three strengths: 25mg, 50mg, and 100mg tablets. The typical starting dose is 50mg, taken approximately 30-60 minutes before sexual activity. Your prescriber may adjust this to 25mg or 100mg based on how well the medication works for you and any side effects experienced. Only one dose should be taken in any 24-hour period.
Branded vs Generic Options
At EverydayMeds, patients can choose between branded Viagra and generic sildenafil during checkout. Both contain the same active ingredient and work identically - the main difference is cost, with generic sildenafil typically being more affordable. This choice allows patients to select the option that best fits their preferences and budget.
Who Can Take Viagra
Viagra is suitable for adult men aged 18 and over who experience erectile dysfunction. Before prescribing, a UK-licensed clinician will assess your medical history, current medications, and cardiovascular health through our clinical assessment process. This ensures the medication is safe and appropriate for your individual circumstances.
Important Safety Considerations
Viagra is not suitable for everyone. It should never be taken alongside nitrate medications (such as GTN spray) due to dangerous interactions that can cause severe drops in blood pressure. Men with certain heart conditions, recent strokes, severe liver problems, or those taking specific medications may not be suitable candidates. Our clinical team will review your medical history to ensure safe prescribing.
What to Expect
Viagra typically begins working within 30-60 minutes of taking it, though this can vary between individuals. Heavy or fatty meals may delay its onset. The effects can last up to 4-6 hours, though this doesn't mean an erection will last this long. The medication simply makes it easier to achieve and maintain an erection when sexually aroused during this timeframe.
