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QLT reports initial proof of concept data for punctal plug delivery technology
Date:5/12/2008

Small study supports the potential for QLT's drug elution technology to

reduce and sustain intraocular pressure

VANCOUVER, May 12 /PRNewswire-FirstCall/ - QLT Inc. (NASDAQ: QLTI; TSX: QLT) announced today results from a proof of concept trial conducted by QLT's wholly-owned subsidiary, QLT Plug Delivery, Inc., of its punctal plug drug delivery technology. The results demonstrated that QLT's drug elution technology was effective in controlling intraocular pressure (IOP) and was well tolerated.

The proof of concept, open label study was initiated to determine if a sustained administration of latanoprost using the Company's punctal plug drug delivery technology could lead to a reduction in IOP over 90 days when administered using a conventional plug design. Five patients (10 eyes) with glaucoma or ocular hypertension were enrolled at a single center. The primary efficacy endpoint was measurement of IOP. At baseline, the mean IOP was 23mmHg for the 10 eyes treated. At 90 day follow-up, the mean IOP was reduced to 17mmHg for the six eyes that remained. Data from two patients were excluded due to loss of plugs. No significant adverse events were reported.

"We are very pleased to report positive results from this preliminary proof of concept trial", said Bob Butchofsky, President and Chief Executive Officer of QLT. "Although the number of patients is small, we are encouraged by the clinically meaningful reduction in IOP that was observed and sustained for approximately 90 days. We look forward to providing you with additional details from this study at our Annual General Meeting on Wednesday, May 14."

The objective of QLT's punctal plug program is to demonstrate that the Company's drug elution technology leads to a statistically significant reduction in IOP for 90 days and that its proprietary punctal plug design can be retained comfortably in a high percentage of patients during that time period. The results presented t
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SOURCE QLT Inc.
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