Clinical trials of Stendra showed that it started working in as little as 15 minutes, compared to an hour for Viagra.
While Stendra also works by increasing blood flow to the penis, the clinical trials suggest that Stendra is more selective. This specificity is expected to result in fewer side-effects.
With over 30 million men in the US suffering from some form of ED, it is anticipated that Stendra will pull in about $300 million in sales annually. In contrast, Viagra earned about $2 billion in 2011. Interestingly enough, a new erection medication may not be enough to arouse investors. Market analysts are more excited about the earning potential of Vivus's obesity drug, Qnexa, which will be reviewed by the FDA in July.
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