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Long-acting Intramuscular Injection Olanzapine Cleared by FDA
Different from both oral and injected short-acting formulations, long-acting formulations of antipsychotics allow for stable concentrations of the active drug to remain at a therapeutic range for an extended period of time.
"Patients, families and communities often needlessly suffer the consequences of relapse when daily schizophrenia medications are not taken as prescribed," said John Kane, M.D., chairman, Department of Psychiatry, The Zucker Hillside Hospital, Glen Oaks, N.Y. "ZYPREXA RELPREVV gives patients an additional treatment option that can help them maintain therapeutic drug levels for up to four weeks at a time."
Approximately 2.4 million Americans or about 1.1 percent of the adult population have schizophrenia.(ii) Schizophrenia is a brain disorder characterized by acute episodes of delusions (false beliefs that cannot be corrected by reason) and hallucinations (usually in the form of non-existent voices), as well as long-term impairments such as diminished emotion, general lack of interest and depressive signs and symptoms.
Proper treatment for schizophrenia can relieve symptoms, prevent or delay relapse and break the "revolving door" cycle often associated with schizophrenia. Non-adherence to antipsychotic medications greatly increases the risk of relapse in patients with schizophrenia. By administering long-acting medications, psychiatrists know when patients have received their medication and can immediately detect non-adherence when a patient does not return for a scheduled injection.
"There is a growing recognition among psychiatrists in the United States that non-adherence to medication is an even greater barrier to care for patients with schizophrenia than was previously understood, and that long-acting treatments can play a beneficial role in helping patients maintain a stable treatment regimen," said John Hayes, M.D., vice president of Lilly Research Laboratories. "ZYPREXA RELPREVV provides a new mechanism for helping appropriate patients benefit from the well-characterized efficacy of olanzapine."
The FDA approval is based on a broad clinical data package involving 2,054 patients, in which ZYPREXA RELPREVV was found to be effective in controlling symptoms of schizophrenia, including hallucinations, delusions, apathy and social withdrawal. Efficacy was shown without the need for oral supplementation. Clinical data showed that ZYPREXA RELPREVV dosages (150, 210, 300 and 405 mg) provide therapeutic olanzapine exposure for two or four weeks depending on the dose.
ZYPREXA RELPREVV was found to have a similar safety profile as oral olanzapine, with the exception of injection-related events, including post-injection delirium/sedation syndrome (PDSS). PDSS events include a wide range of signs and symptoms of sedation, from mild in severity to coma, and/or delirium, including confusion, disorientation, agitation, anxiety or other cognitive impairment. As of November 30, 2009, across all clinical trials, PDSS events have occurred in Lilly worked with the FDA to develop a Risk Evaluation and Mitigation Strategy (REMS), which includes a communication plan, a patient medication guide and a mandatory Patient Care Program, which restricts distribution of ZYPREXA RELPREVV to prescribers, healthcare facilities, pharmacy service providers and patients enrolled in the program. The goal of the Patient Care Program is to mitigate the risk of negative outcomes associated with ZYPREXA RELPREVV PDSS.
Source: Eli Lilly and Company