Viagra Dosage

Viagra is one of the most popular drugs in the world:
• Billions of spam messages advertising these pills are sent worldwide every day. There is so much spam on this topic that Pfizer (the manufacturer of Viagra) had to build a webpage titled “Avoid Fake Viagra”.
• Pfizer spends millions of dollars on Viagra advertising.
• Pfizer declares that 9 pills of Viagra are dispensed in the world every second, and this is about 300 million pills a year.