By blocking its effects, sildenafil improves blood supply to the tissue and makes it easier to get — and stay — hard.

While generic sildenafil and Viagra are equally safe and effective phosphodiesterase type 5 (PDE5) inhibitors, they have one key difference: price. Viagra costs $90 to $139 per tablet. Generic ...

Purpose: The stability of sildenafil citrate 2.5 mg/mL in two extemporaneously prepared oral suspensions stored at 4 and 25 ºC was studied. Methods: Thirty 25-mg tablets of sildenafil citrate ...