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May 31, 2011 > FDA approves Optimer drug for hospital infection

FDA approves Optimer drug for hospital infection

By Matthew Perrone, AP Health Writer

WASHINGTON (AP), May 27 - The Food and Drug Administration has approved a new antibiotic to treat an intestinal infection that afflicts more than 700,000 U.S. patients each year and can sometimes prove fatal.

Optimer Pharmaceuticals Inc.'s Dificid tablets were approved Friday to treat Clostridium difficile, an infection that usually affects older patients and can cause symptoms ranging from diarrhea to potentially life-threatening inflammation of the colon. It is most common in hospitals and nursing homes where the bacteria's spores can be found in bed linens, bathrooms and medical equipment.

Clostridium difficile recently surpassed a type of staphylococcus bug as the most common hospital-acquired infection, according to researchers at Duke University Medical Center.

Optimer's twice-a-day tablet is the first new drug approved for the infection in nearly 25 years, according to the company.

In recent decades, some varieties of germs have grown immune to popular antibiotics like penicillin, creating concern about the dwindling number of new antibiotics available. The new drug, known generically as fidaxomicin, is only the third antibiotic cleared by the FDA since 2006, according to Optimer.

``When we started out, this was a relatively small segment of the market and it was not clear how a drug could be better than vancomycin,'' said Optimer Chief Executive Pedro Lichtinger, referring to the currently prescribed antibiotic. ``But our scientists were able to see the growth of this market and the weakness of the current treatment.''

In company trials, Dificid worked as well as vancomycin at treating the infection. The drug proved superior at preventing re-infection three weeks after treatment when compared with the older drug.

Dificid is the first FDA-approved product for San Diego-based Optimer Pharmaceuticals Inc., a company that has focused on developing antibiotics since its founding in 1998.

Cubist Pharmaceuticals will help sell the drug in the U.S. under a partnership with Optimer. Astellas Pharma will market the drug in Europe and other countries abroad.

JMP Securities analyst Liisa Bayko expects $8.7 million in sales for Dificid this year, rising to $72 million by 2012. Bayko expects Optimer to achieve profitability by 2014.

Optimer shares rose 42 cents, or 3.2 percent, to $13.40 in aftermarket trading. In the regular session, the stock dropped $1.01, or 7.2 percent, to $12.98.

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