DURECT Reports Positive Phase IIb Data from TRANSDU(TM)-Sufentanil Clinic...(udy approximately half (36 out of 74) of...),Health

Date:3/16/2009

udy, approximately half (36 out of 74) of the screened patients successfully entered the maintenance period, which is consistent with expectations for the study and with other chronic pain studies of a similar nature. After exploring multiple dose titration regimens, two acceptable dose titration intervals have achieved the desired analgesic effect and side-effect profile, and therefore are expected to be utilized in Phase III.

Relative Potency

As a result of converting screened patients to stable pain control and into the maintenance period (see above), the conversion ratios from oral morphine equivalents at baseline to TRANSDUR-Sufentanil dosage strengths were established and are expected to be utilized in the Phase III program.

Efficacy

Although not the main goal of the study, the mean pain score during the maintenance period of 3.88 (on a numerical ratings scale for pain intensity of 0-10, with 0 being no pain) represented a reduction of approximately 19% from the mean baseline pain score of 4.78. These pain scores represent the mean for the patients that had a maintenance pain value and a baseline pain value (n=36) and computations were based on the intention-to-treat patients set. Only 1 patient out of 36 (approximately 2.8%) dropped out of the study during the maintenance period for lack of efficacy.

Safety and Tolerability

The safety summary is consistent with commonly expected adverse events using transdermal therapy systems with opioids. Only 1 out of 74 patients (approximately 1.4%) dropped out of the study due to application site reaction (local pruritis) and that one instance occurred during the first visit. No patients dropped out of the study due to application site adverse events during the maintenance period. No patients' adverse events were rated as severe.

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