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Looking for quick answers about Viagra for men? Our comprehensive FAQ addresses the most common questions about this well-known erectile dysfunction treatment. From how Viagra works and dosage guidance to side effects and interactions, we've compiled essential information to help you make informed decisions about your treatment. Whether you're considering Viagra for the first time or need clarification about your current prescription, these frequently asked questions provide practical, medically-accurate answers in an easy-to-reference format.
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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 is the brand name for sildenafil citrate, manufactured by Pfizer. It belongs to a class of medications called PDE5 inhibitors, which work by increasing blood flow to the penis during sexual arousal. Viagra doesn't cause automatic erections - sexual stimulation is still required. The medication blocks the enzyme phosphodiesterase type 5, allowing blood vessels in the penis to relax and fill with blood more effectively when you're sexually aroused.
At EverydayMeds, we offer both branded Viagra and generic sildenafil, giving you choice at checkout. Both contain the same active ingredient and work identically, with generic sildenafil typically being more cost-effective whilst maintaining the same quality and effectiveness.
Viagra is typically taken 30-60 minutes before sexual activity. The medication can work within 30 minutes for some men, though it may take up to an hour for full effect. The effects can last for 4-6 hours, though this doesn't mean you'll have an erection for this entire period - you'll still need sexual stimulation for the medication to work.
For optimal effectiveness, consider taking Viagra on an empty stomach or after a light meal. High-fat meals can delay how quickly the medication works. You should only take one dose within a 24-hour period, and it's important never to exceed the prescribed dosage.
Viagra is available in three strengths: 25mg, 50mg, and 100mg tablets. Most men start with a 50mg dose, which can then be adjusted based on effectiveness and tolerability. Your prescriber may recommend a lower 25mg dose if you experience side effects, or increase to 100mg if the 50mg dose isn't sufficiently effective.
The appropriate dosage depends on various factors including your age, overall health, other medications you're taking, and how you respond to treatment. Your EverydayMeds consultation will help determine the most suitable starting dose for your individual circumstances.
Viagra is suitable for adult men over 18 who experience erectile dysfunction. However, it's not appropriate for everyone. You cannot take Viagra if you're currently using nitrate medications (such as GTN spray for chest pain), as this combination can cause a dangerous drop in blood pressure. It's also not suitable for men with severe heart conditions, recent heart attacks or strokes, severe liver problems, or very low blood pressure.
Before prescribing Viagra, healthcare professionals assess your cardiovascular health, current medications, and medical history through a clinical consultation. This ensures the treatment is safe and appropriate for your individual situation.
The most common side effect of Viagra is headache, experienced by more than 1 in 10 men. Other frequent side effects include facial flushing, indigestion, nasal congestion, dizziness, and temporary visual changes such as a blue tinge to vision or increased light sensitivity. These side effects are typically mild and often reduce as your body adjusts to the medication.
Serious side effects are rare but require immediate medical attention. These include priapism (painful erections lasting more than 4 hours), sudden vision or hearing loss, chest pain during sexual activity, or signs of allergic reaction. If you experience any concerning symptoms, seek medical help promptly.
Moderate alcohol consumption is unlikely to cause problems when taking Viagra. However, excessive drinking can reduce the medication's effectiveness and worsen side effects such as dizziness and low blood pressure. Both alcohol and Viagra can lower blood pressure, so combining large amounts may cause problematic drops in blood pressure.
For best results, limit alcohol intake when planning to use Viagra. If you do drink, keep it moderate and be aware that alcohol can also independently contribute to erectile difficulties.
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