Study Protocols Will be Amended in Two Small Early-Phase Prasugr... ( Enrollment temporarily suspended un...)

Study Protocols Will be Amended in Two Small Early-Phase Prasugrel Studies

Date:10/24/2007

Enrollment temporarily suspended until approval of amendments, which may

include adjustments in dosing for certain subpopulations

TOKYO, Japan and INDIANAPOLIS, Oct. 24 /PRNewswire-FirstCall/ -- Daiichi Sankyo Company, Limited (TSE: 4568) and Eli Lilly and Company (NYSE: LLY) today announced that enrollment of new patients and administration of the study drug in two small prasugrel-related pharmacodynamic clinical trials are being suspended until protocol amendments can be completed and approved. The amendments are due to preliminary results from pharmacokinetic analyses, including patients and healthy subjects/volunteers, indicating that a dose adjustment may be appropriate for certain subpopulations.

These protocol amendments should not be interpreted to represent the outcome of the overall prasugrel clinical development program.

The two small Phase II pharmacodynamic studies compare the levels of inhibition of platelet aggregation (IPA) in patients with coronary artery disease taking the investigational antiplatelet agent prasugrel or clopidogrel (Plavix(R)). Neither study has an efficacy endpoint. Patient enrollment will resume as soon as additional analyses of pharmacokinetic and clinical data are completed, and the protocols are amended and approved by institutional review boards.

"We are suspending enrollment in these two small pharmacodynamic trials so that we can amend current protocols," said J. Anthony Ware, M.D., Lilly cardiovascular platform leader for prasugrel. "These amendments are strictly protocol-related and do not provide a basis for inferring overall outcomes of other prasugrel trials."

Cardiovascular disease is the leading cause of death in the U.S. and wor
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