Marketing and Advertisements
Viagra is the Pfizer’s blued eyed and it has been spending on its marketing and advertisement more than anything last 
year a total of $440 million was spent on its advertisements but its pretty natural and that is the reason why it was rated as the best brand. Also to make people get over the societal barriers that hinders in the use of this drug there needs a lot of persuasion and to make feel the user that it’s not a crime or something to talk about their erectile dysfunction or look for ways to cure this problem as any one can suffer from this just like cough and cold.
In the initial days it was very difficult for them as they had to think of ways how to educate, persuade and promote their product. As they had an unchallenged monopoly in oral solution for erectile dysfunction drugs for 7 long years, so they least cared about the competition but the later discovery of side effects proved to be their biggest competitor and they really had to pull their socks in order to refute those people who were cashing in this loop hole of their brand.
Some of its commercials did caused a lot of controversy and were later banned, one such instance was where a man was shown that he grew horns after the intake of Viagra, as it passed a wrong message to the society but it was very true though.
Their one tactic is very interesting that in its ads and promotion campaigns it publicise Viagra’s relationship with NASCAR driver Mark Martin and Major League Baseball player Rafael Palmeiro, which other brands don’t do.