Nektar Presents Data Demonstrating Favorable Oral Bioavailability and Drug-Drug Interaction Profile fo... (oster #141: Comparative bioavailability...)

Nektar Presents Data Demonstrating Favorable Oral Bioavailability and Drug-Drug Interaction Profile for NKTR-118

Date:9/13/2009

oster #141: "Comparative bioavailability of NKTR-118 tablets and solution: a case of bioequivalence between dosage forms for a rapidly absorbed drug"

The corresponding abstracts for these presentations are published in the September 2009 issue of The Journal of Clinical Pharmacology (J. Clin. Pharmacol., Sept 2009; 49:1123).

About Opioid-Induced Constipation

The oral peripheral antagonist NKTR-118 targets mu-opioid receptors within the enteric nervous system, which mediate opioid-induced bowel dysfunction, a symptom complex resulting from opioid use that encompasses symptoms such as constipation, bloating, abdominal cramping, and gastroesophageal reflux. Constipation is the hallmark of this syndrome and is generally its most prominent component. In patients who take opiates chronically for pain management, anywhere from 45-90% of patients will develop debilitating constipation associated with other symptoms of opioid-induced bowel dysfunction as a result of the drug binding to the mu-opioid receptor in the gut(1).

According to IMS Health, about 230 million prescriptions were written for opioids in 2007 in the United States alone. Currently, there are no oral drugs approved that are indicated to treat opioid-induced constipation (OIC). Opioid bowel dysfunction and OIC can significantly impact quality of life and increase healthcare utilization.

Nektar is also developing NKTR-119, an investigational drug candidate that is a co-formulation of oral NKTR-118 and an opioid analgesic. The product is designed to provide good analgesic properties in the chronic treatment of moderate to severe pain patients while avoiding the debilitating side effects that are common with opioid use, such as constipation and other symptoms of bowel dysfunction.

About Nektar

Nektar Therapeutics is a biop
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1. Nektar Commences Phase 2 Clinical Development Program for NKTR-102 (PEG-Irinotecan) in Colorectal Cancer
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7. Nektar Announces Positive Results from Phase 2 Study of Oral NKTR-118 in Patients with Opioid-Induced Constipation (OIC)
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Nektar Presents Data Demonstrating Favorable Oral Bioavailability and Drug-Drug Interaction Profile fo...(oster #141: Comparative bioavailability...),Health