Viagra pills come in 3 different dosage, 25mg, 50mg and 100mg.
Usually for healthy male, 50mg is more than enough. But make sure
that you dont have any history of heart and high blood problem.
Best is to consult your GP first before trying it out.
If you take them during right time (ie without alcohol or heavy and
oily meal) you will find that your penis will remain erected even
after ejeculation. And you will feel like you are a superman or
Popeye on spinach.