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Viagra, one of the leading answers for erectile dysfunction works for four hours. But some of the users say it can be effective for 6-8 hours. The drug is effective to solve the problem with regards to penis erection.

Another thing that you need to know is about Levitra. This is a drug that you can take and its effect stays longer than that of Viagra. It is said that Levitra consists of fewer side effect but more expensive than Viagra.

The other drug for erectile dysfunction is Cialis. Cialis is famous and it works for 36 hours longer than that of Viagra or Cialis. You just need to wait for 30 minutes before it takes effect.

You may wonder where to get these drugs. You can get it online and what you need to do is visit the site http://www.pharmashack.com. This site is the leading site in providing Cialis, Viagra and Levitra.