In early December, the FDA announced that it had received information about the Innohep in Renal Insufficiency Study (IRIS) that was stopped in February because of an interim finding of increased mortality in elderly patients.

As a result, in July, the company revised the prescribing information to restrict the use of Innohep in patients 90 years of age and older. However, preliminary data from IRIS suggests that the increased risk of mortality is not only limited to patients in that age range. Study results suggest that compared to unfractionated heparin, Innohep increases the risk of death for patients 70 years and older with renal insufficiency and deep vein thrombosis (DVT), pulmonary embolism (PE), or both. The FDA suggested health care professionals consider the use of alternative treatments for patients older than 70 years of age with those conditions.

The FDA says it anticipates submission of the final IRIS study report sometime in January and will complete its review soon thereafter. Additional regulatory actions as appropriate will be considered after thorough review of all applicable data from the manufacturer of Innohep.

SOURCE: Heparin Recall › Celgene issues letter warning of limited use of heparin drug

At the time the study was stopped, 350 patients had completed a 90 days of follow-up. Twenty-three out of 176 patients who received tinzaparin died, compared to nine out of 174 who received unfractionated heparin. The FDA says it sees no clear pattern as to the cause of death nor do the deaths appear to be related to either over-dosing or under-dosing of an anti-coagulant.

In July, the company revised the prescribing information to restrict the use of Innohep in patients 90 years of age and older. However, preliminary data from IRIS suggests that the increased risk of mortality is not only limited to patients in that age range. Study results suggest that compared to unfractionated heparin, Innohep increases the risk of death for patients 70 years and older with renal insufficiency and deep vein thrombosis (DVT), pulmonary embolism (PE), or both. The FDA suggests health care professionals consider the use of alternative treatments for patients older than 70 years of age with those conditions.

The FDA has requested that the labeling for Innohep be revised to better describe the overall results of IRIS. The agency anticipates final IRIS results in January 2009, and will complete its review at that time.

SOURCE: Heparin Recall › FDA requests better labeling of low molecular weight heparin