Viagra

Viagra Sildenafil is a medicine used to treat erectile dysfunction. It increases blood flow to the penis to help men get an erection. At least two-thirds of men have improved erections after taking it.

• It usually takes 30 to 60 minutes for viagra to work for erectile dysfunction. You can take it up to 4 hours before you want to have sex.
• Taking sildenafil alone will not cause an erection. You need to be aroused for it to work.
• The most common side effects are headaches, feeling sick, hot flushes and dizziness. Many men have no side effects or only mild ones.