Sildenafil – What It Is, How It Works, and What to Know

When working with Sildenafil, a phosphodiesterase‑5 inhibitor prescribed for erectile dysfunction. Also known as Viagra, it belongs to the class of PDE5 inhibitors, a group of drugs that increase blood flow to the penis by blocking the enzyme PDE5. This mechanism directly targets erectile dysfunction, the inability to achieve or maintain an erection suitable for sexual activity. By relaxing smooth muscle tissue and boosting nitric‑oxide signaling, Sildenafil helps many men regain confidence and improve intimate relationships.

How Sildenafil Works, Who Can Use It, and What to Watch For

The drug typically takes effect within 30‑60 minutes and lasts about four to six hours, making timing an important factor for spontaneous intimacy. Standard doses start at 50 mg, with adjustments to 25 mg or 100 mg based on response and tolerance. Common side effects include mild headache, flushing, upset stomach, and visual changes; serious concerns involve sudden vision loss, priapism, or heart‑related events. Because cardiovascular disease can increase the risk of complications, doctors usually require a health screening before prescribing. Nitrate medications for chest pain are a strict no‑go, as the combination can cause a dangerous drop in blood pressure. Other PDE5 inhibitors like Cialis (tadalafil) and Levitra (vardenafil) offer longer or shorter windows of activity, but the core safety principles remain the same.

Choosing between brand‑name Viagra and generic Sildenafil often comes down to price and personal preference. Generic versions deliver the same active ingredient at a lower cost, but it’s crucial to buy from reputable online pharmacies that require a prescription and display a licensed pharmacy seal. Look for clear pricing, verified pharmacist contact, and transparent shipping policies to avoid counterfeit pills. Storing the tablets in a cool, dry place preserves potency, especially if you travel or keep a supply for occasional use. Discuss any existing health conditions—such as diabetes, hypertension, or prostate issues—with your doctor to ensure the dose fits your situation. Below you’ll find a curated mix of articles that dive deeper into dosing strategies, safety comparisons, buying guides, and alternatives, giving you a full toolkit to make informed decisions about Sildenafil.