The Big Three: Viagra, Cialis, and Levitra
The big three erectile dysfunction drugs are sildenafil citrate, taladafil, and vardenafil. The first is commonly marketed as Viagra and manufactured by Pfizer (creator of the anti-cholesterol drug Lipitor). The second one is a creation of the pharmaceutical giant Lilly-ICOS (popular for the drug Prozac) and marketed as Cialis. The last one is a joint creation of Bayer Pharmaceuticals (creator of Aspirin) and GlaxoSmithKline (creator of the anti-ulcer drug Zantac.
viagra was approved as a treatment for erectile dysfunction by the US Food and Drug Administration on March 27, 1998. Viagra ruled the market and defeated other ED remedies like penile prostheses and penile pumps. The drug has given a cheaper and non-invasive alternative to treat ED. The US Food and Drug Administration finally approved Cialis and Levitra the year 2003 for ED treatment. Since 2003, the share of Pfizer in the ED drug market has been reduced from 100% during its launch to less than 50% due to competition from other new ED drugs, nutritional supplements claiming to treat impotency and the generics market that has become powerful online.
As to half-life, Cialis appears to be the longest at 17.4 hours followed by Levitra at 4.5 hours and Viagra is the shortest at 3 to 4 hours. Some say that Cialis is the best ED weekend pill because of its longer effect. Of course, no man would report to office with an erected penis ' this would draw tremendous amount of laughter from colleagues and jokes during office Christmas parties. Viagra and Levitra are great during weekdays because of their shorter half-life.
As to advertisement stunts, Viagra and Cialis appear to be ahead. Viagra hires topnotch clelebrities, sports players and politicians do be endorsers and spokespersons for the medicine. Former Senator Bob Dole of Kansas, Playboy founder Hugh Hefner, and football legend Pele. Cialis sponsor Sports events like the Super Bowl, PGA Tour and America's Cup. In the 2004 Super Bowl, Cialis ads were outshone by Janet Jackson's indecent exposure. This event however helped brought Cialis to the limelight as it was mentioned over and over again in the news and comedy shows accompanying the names Janet Jackson and Justin Timberlake. Levitra on the other hand made very creative commercials but the US FDA were quick to point out that such commercials are misleading and inappropriate. Europeans however can watch the commercials unedited on their television sets.
As to market share, Viagra is still ahead because the other two are waiting approval in both the European and Asian markets. Many Asians and Europeans automatically associate the word Viagra with erectile dysfunction or impotency. When they want to treat their problem, they usually buy viagra online . It would take some two years or so before Asians can start buying their weekend pills and Levitras online.
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