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No Sticking Point Here: Pfizer's Potential Blockbuster Works

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Translating successful phase 2 results into a positive phase 3 trial can require a bit of luck, especially for a disease such as rheumatoid arthritis where the outcomes are somewhat subjective.

Take Pfizer (NYSE: PFE  ) 's oral rheumatoid arthritis drug, tasocitinib, where 26.7% of the patients taking placebo reported a 20% improvement in their symptoms. That's a huge baseline to jump over, but tasocitinib did it without much problem. In its first phase 3 trial, 59.8% of patients reported 20% improvement of their symptoms, while the higher dose helped 65.7% of patients to report the same.

Pfizer is in a race with Rigel Pharmaceuticals (Nasdaq: RIGL  ) and Incyte (Nasdaq: INCY  ) to develop an oral medication to treat rheumatoid arthritis. Of course, there's likely room for all three if they can all pass their phase 3 trials.

The current market is dominated by a trio of multi-billion drugs: Humira from Abbott Labs (NYSE: ABT  ) , Remicade from Johnson & Johnson and Merck (NYSE: MRK  ) , and Enbrel from Amgen (Nasdaq: AMGN  ) and Pfizer. All three have to be injected or infused, so the market is wide open for an oral medication.

Pfizer towering over tiny Rigel and Incyte may not be much of an advantage, since both drugmakers have partnered out their drugs to large pharma. AstraZeneca licensed Rigel's R788 and Eli Lilly (NYSE: LLY  ) has dibs on Incyte's INCB28050.

Pfizer is in the lead, but being first isn't nearly as important as being best. We won't know the full scope of the latter until Pfizer releases more phase 3 data -- four studies are expected to be completed in the first half of next year -- and the competitors begin to release their phase 3 data.

Investors can still breathe a sigh of relief that the drug worked in a larger phase 3 trial. The risk of failure isn't completely mitigated, but it's gone down substantially.

Interested in keeping track of Pfizer as its pipeline tries to fill in for the loss of Lipitor? Click here to add it to My Watchlist, which will help you keep track of all our Foolish analysis on Pfizer.

Pfizer is a Motley Fool Inside Value pick. Motley Fool Options has recommended a diagonal call position on Johnson & Johnson, which is a Motley Fool Income Investor pick. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

Fool contributor Brian Orelli, Ph.D., doesn't own shares of any company mentioned in this article. The Fool owns shares of Johnson & Johnson and has a disclosure policy.

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