Although Viagra is effective for most guys with ED, it’s important to make sure you’re taking the right dose. Too low of a Viagra dosage and your arousals may not be as firm or reliable as they could ...

You’ve been prescribed Viagra, or the generic version sildenafil, and finally your erectile dysfunction (ED) problems are over. But then…it doesn’t work. Ugh ...

Medically reviewed by Matthew Wosnitzer, MD Key Takeaways Viagra lasts for about four hours, but it can last longer in some ...