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Titan Pharmaceuticals Announces Positive Results of Six-Month Open-Label Safety Retreatment Study of Probuphine

Published: Thursday, February 09, 2012
Last Updated: Thursday, February 09, 2012
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Patients report high satisfaction, decreased opioid dependence problems and significant overall improvement with Probuphine; NDA expected to be filed in 3Q 2012.

The company announced the results of an open-label, six-month safety re-treatment study (PRO-811) of patients with opioid dependence who previously completed a full six months of treatment in Titan's confirmatory Phase 3 clinical trial of the investigational drug Probuphine™. In the 85 patients enrolled in this retreatment study, Probuphine was shown to be well tolerated, including the implant insertion and removal procedures, with a low incidence of adverse events and overall safety profile similar to that observed in the confirmatory Phase 3 study. Patients also reported a decreased use of illicit opioids, good control of opioid withdrawal and cravings and high overall satisfaction with Probuphine. These data build upon the positive results of the Probuphine Phase 3 program reported to date and further support the company's preparation of a New Drug Application (NDA) for Probuphine.

Titan also provided an update on the preparation of the NDA for Probuphine, which it now plans to submit in the third quarter of this year. The company is on track to complete its analytical testing of Probuphine to provide additional Chemistry, Manufacturing and Control (CMC) data requested by the U.S. Food and Drug Administration (FDA) along with its preparation of the integrated clinical data, summary reports and electronic document preparation by mid-year. The manufacturing facility expansion and qualification for commercial scale production of Probuphine is in process, but has been slightly delayed due to longer than expected lead-time on air handling equipment and the manufacturing of three qualification batches is now expected to be completed in September.

"As a clinician, I know first-hand how desperate the patient need is for a safe and effective treatment for opioid dependence, especially one that patients feel improves their condition and their compliance," said Walter Ling, M.D., Professor of Psychiatry and Director, Integrated Substance Abuse Programs at the David Geffen School of Medicine at UCLA. "These data continue to show that Probuphine could represent a new and potentially improved method of delivering buprenorphine to patients -- one that improves the quality of life of patients, lessens physicians' concerns about compliance and medication diversion and shifts the treatment landscape."

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