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Zysolin(TM) Pre-clinical Data Supports Once-a-day Dosing in Humans
Date:6/18/2009

    AlphaRx's inhaled Tobramycin nanoparticle formulation provides 300% more
    availability than standard free drug in lung tissue, as demonstrated in a
    recent animal pharmacokinetic study.

MARKHAM, ON, June 18 /PRNewswire-FirstCall/ - AlphaRx (OTC BB:ALRX) is pleased to report a significant breakthrough in the development of Zysolin(TM), an inhaled Tobramycin nanoparticle formulation utilizing the company's proprietary drug delivery platform, and intended for the adjunctive treatment of Pseudomonas Aeruginosa Pneumonia in intubated and mechanically-ventilated patients (VAP).

In a recent pivotal animal PK (pharmacokinetic) study, Zysolin(TM) delivered 300% more drug to lung tissue than free drug, when utilizing the same delivery method. This data demonstrates that Zysolin(TM) provides superior lung tissue penetration and a release profile which supports once-a-day human dosing frequency.

The study data will be presented, by invitation, to the upcoming July meeting of the Controlled Release Society Conference in Copenhagen, Denmark.

Dr. Michael Weisspapir, MD, PhD, Chief Medical Scientist of AlphaRx commented, "As a result of this pre-clinical data, we anticipate that the demonstrated superiority over free drug availability will result in higher drug concentrations in lung tissue, enhancing clinical efficacy for VAP patients in vivo."

About Zysolin(TM)

Zysolin(TM) is a Tobramycin compound, encapsulated in AlphaRx's Nano Drug Delivery Platform, intended for the adjunctive treatment of Gram-negative pneumonia in intubated and mechanically-ventilated patients. Zysolin(TM) improves the intracellular activity of Tobramycin - in layman's term, increasing the drug concentration of Tobramycin inside human macrophages, thus improving its antibacterial activity against intracellular Klebsiella, Pseudomondas aeruginosa and Staphylococcus bacterial strains in pneumonia patients. The
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SOURCE AlphaRx Inc.
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