Buy Viagra Online USA — Sildenafil Citrate 25mg, 50mg, 100mg

About Viagra (Sildenafil Citrate) — How It Works

Viagra is the world's first oral treatment for erectile dysfunction, approved by the FDA in 1998. Manufactured by Pfizer, Viagra contains Sildenafil Citrate as its active ingredient. It works by increasing blood flow to the penis, helping men achieve and maintain an erection when sexually aroused.

How Viagra Works

Viagra belongs to a class of medications called PDE5 inhibitors. When sexually stimulated, the body releases nitric oxide, which triggers the production of cGMP. This chemical relaxes smooth muscles in the penis, allowing increased blood flow and resulting in an erection. Viagra works by inhibiting the PDE5 enzyme that breaks down cGMP, thereby maintaining the erection for longer periods.

How Long Does Viagra Last? Timing & Effectiveness

Viagra typically begins working within 30-60 minutes after taking it. For optimal results, take Viagra on an empty stomach or after a light meal. The medication remains effective for approximately 4-6 hours, though this varies by individual. Sexual stimulation is required for Viagra to work - it does not cause spontaneous erections.

Viagra Dosage Guide — How to Order the Right Strength

The recommended starting dose is 50mg, taken as needed approximately one hour before sexual activity. Based on effectiveness and tolerance, the dose may be increased to 100mg or decreased to 25mg. Do not take Viagra more than once per day. Men over 65 or those with certain medical conditions may require a lower starting dose.

Who Can Buy Viagra Online in the USA?

Viagra is suitable for adult men experiencing erectile dysfunction. It has been proven effective for ED caused by various factors including diabetes, high blood pressure, prostate surgery, and psychological causes. However, it's not recommended for men taking nitrate medications for chest pain or those with severe cardiovascular conditions. Always consult a healthcare provider before starting treatment.

Side Effects

Common side effects include headache, facial flushing, indigestion, nasal congestion, and changes in color vision. These are typically mild and temporary. Serious side effects are rare but seek immediate medical attention if you experience chest pain, sudden vision loss, or an erection lasting more than 4 hours.