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Default 11-12-2004, 04:45 PM

November 12, 2004 10:30 AM US Eastern Timezone

AVANIR Presents Phase II Data on Neurodex for Neuropathic Pain at the ASRA Pain Meeting


SAN DIEGO--(BUSINESS WIRE)--Nov. 12, 2004--AVANIR Pharmaceuticals (AMEX:AVN) today presented the results of a clinical study of its lead drug candidate Neurodex™ in patients with painful diabetic neuropathy at the 2004 annual meeting of the American Society of Regional Anesthesia and Pain Medicine (ASRA). The poster, An Open-Label Dose-Escalation Study of Dextromethorphan and Quinidine in Painful Diabetic Neuropathy, describes results demonstrating that Neurodex is well-tolerated up to the highest target dose. Additionally, patients reported decreased pain intensity that was significantly different from baseline pain (p less than 0.0001). The degree of pain relief increased with the duration of the study.

The clinical trial was conducted at five U.S. sites in 36 adult volunteers with painful diabetic neuropathy and was designed to evaluate the safety and tolerability of escalating doses of Neurodex for future clinical trials. AVANIR expects to initiate a Phase III clinical trial evaluating the safety and efficacy of Neurodex in the treatment of diabetic neuropathic pain in 2005.

Neurodex is comprised of dextromethorphan and an enzyme inhibitor that slows the rapid metabolism of dextromethorphan in the liver. Slowing the metabolism with the inhibitor makes it possible to maintain therapeutic levels for a longer period of time with relatively small doses of dextromethorphan. The NMDA receptor antagonist and sigma-1 agonist activity of Neurodex suggests utility in treating certain central nervous system disorders including neuropathic pain.

Diabetic neuropathy, caused by nerve damage as a consequence of diabetes, is a condition in which diabetics experience pain on a regular basis in their extremities. According to the American Diabetes Association, at least half of the 17 million Americans who have diabetes are estimated to suffer from diabetic neuropathic pain.

AVANIR Pharmaceuticals is a drug discovery and development company focused on treatments for chronic diseases. The Company's most advanced product candidate, Neurodex, is in Phase III clinical development for pseudobulbar affect, and in Phase II clinical development for neuropathic pain. A potential treatment for allergy and asthma, AVP 13358, is in Phase I clinical development. The Company's first commercialized product, Abreva®, is marketed in North America by GlaxoSmithKline Consumer Healthcare and is the leading over-the-counter product for the treatment of cold sores. Further information about AVANIR can be found at

AVANIR press releases and presentations, including any forward-looking statements contained therein, should be reviewed in conjunction with the Company's most recent Annual Report on Form 10-K and other publicly available information regarding the company. Copies of such information are available from the company upon request. Such publicly available information sets forth many risks and uncertainties related to the company's business and technology. Forward-looking statements often contain such words as "estimate," "anticipate," "intend," "plan" or "expect." Research findings are not always supportable by evidence obtained from subsequent clinical trials. This Phase II open label study was a non-placebo controlled trial and, therefore, will not be acceptable as one of the two clinical trials expected to be required for FDA approval. The Company can make no assurances that the Neurodex Phase III clinical trials will yield positive results. Final review decisions made by the FDA and other regulatory agencies concerning Neurodex clinical trial results are unpredictable and outside the influence and/or control of the company. AVANIR disclaims any intent or obligation to update these forward-looking statements.

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deadevilfrog Offline
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Default 11-13-2004, 12:31 PM

This is tangential, but I have had the thought rise to my consciousness whilst using dex the past couple of weeks, about its possible application for certain kinds of pain in an ER type enviornment. I have some chronic pain issues (and not so tangential, I am an isulin dependant diabetic) and I definetely get pain attenuation with dex. I was thinking that a 250mg dose (just barely touch the 2nd plateau) would be effective for a chronic pain flair up and might be more beneficial than traditional opiates especially in cases where the patient admits to having had abused opiates in the past. But I guess the thing is that the psychedelic nature of the substance could set off panic or confusion in the general populace, and be undesirable I guess like ketamine.

As far as being right on topic I would imagine if this could get to real accepted phase III trials that there would be the added benefit of more data regarding dex use would spill over. That would be awesome.

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Magnus_Grey Offline
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Default 11-13-2004, 12:38 PM

So how many CCC's is it safe to mix with a 4th plateau of neurodex?

On a serious note, this is actually rather interesting.


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