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Oscient Pharmaceuticals


received a request from regulators for additional information on its pneumonia drug Factive.

The Food and Drug Administration issued the company an approvable letter, a formal statement that a drug can be cleared pending the submission of additional information. No new clinical trials are required, the company says.

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Oscient expects to provide the information within the next few weeks and should hear back from the FDA within two months. Shares rose 13 cents, or 13%, to $1.12.

The company is seeking approval of the drug as a five-day treatment for community-acquired pneumonia. The drug is already cleared as a seven-day treatment for the disease. Factive is also used for acute bacterial exacerbations of chronic bronchitis as a five-day course.