Viagra (sildenafil citrate) is a medication primarily used to treat erectile dysfunction (ED) in men.
It works by increasing blood flow to the penis during sexual stimulation, helping to achieve and maintain an erection. Viagra belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors, which help relax the blood vessels.
The medication is typically taken about 30 to 60 minutes before sexual activity and remains effective for up to four hours. Its main benefits include improved sexual performance and enhanced confidence for those affected by ED.