SkyePharma Announces Receipt of Milestone Payment for DepoDur(TM) LONDON, Oct. 25 /PRNewswire-FirstCall/ -- SkyePharma PLC (LSE:SKP) ( NASDAQ: SKYE) announces today that it has received a US$5 million milestone payment from Endo Pharmaceuticals Inc. ("Endo", Nasdaq: ENDP) in respect of DepoDur(TM). DepoDur(TM), which was approved by the US Food & Drug Administration ("FDA") on May 18, is SkyePharma's novel single dose sustained-release injectable formulation of morphine for the relief of pain after major surgery. Endo is SkyePharma's licensee for DepoDur(TM) in North America. Under the terms of an agreement signed in December 2002, SkyePharma is entitled to certain milestone payments from Endo. These include a payment of US$5 million once DepoDur(TM) has received FDA approval and SkyePharma has supplied launch quantities of the product to Endo. These conditions have now been satisfied. Michael Ashton, Chief Executive of SkyePharma, said: "We are pleased to report the receipt of this payment. Our partner Endo commenced US promotion of DepoDur(TM) in the third quarter, with an encouraging initial response, and we now look forward to the formal US launch of our most important product in the fourth quarter. We are confident that DepoDur(TM) has great potential to improve the treatment of pain following major surgery." For further information please contact: SkyePharma PLC +44 207 491 1777 Michael Ashton, Chief Executive Officer Peter Laing, Director of Corporate Communications Sandra Haughton, US Investor Relations +1 212 753 5780 Buchanan Communications +44 207 466 5000 Tim Anderson / Mark Court About SkyePharma PLC SkyePharma PLC develops pharmaceutical products benefiting from world-leading drug delivery technologies that provide easier-to-use and more effective drug formulations. There are now ten approved products incorporating SkyePharma's technologies in the areas of oral, injectable, inhaled and topical delivery, supported by advanced solubilization capabilities. For more information, visit http://www.skyepharma.com/. About DepoDur(TM) DepoDur(TM) is a single dose extended-release injectable formulation of morphine sulphate. DepoDur(TM) employs SkyePharma's proprietary DepoFoam(TM) technology and is supplied as a ready-to-use suspension. It is given as a single epidural injection before or during surgery and provides pain relief for up to 48 hours following surgery. There is no need for an in-dwelling catheter for continuous infusion, thereby overcoming a major drawback to the otherwise theoretically desirable epidural route of administration for opioid analgesics. DepoDur(TM) is designed for the control of pain after major surgery. SkyePharma and Endo expect that its main use will be in control of post-operative pain in hospitalized patients undergoing major surgical procedures requiring general or regional anesthesia such as major abdominal surgery, orthopedic surgery and caesarean section. Currently there are an estimated 6 million such procedures every year in the USA and 5 million in Europe. DepoDur(TM) is supplied in a 2 ml vial containing a 10 mg/ml suspension in sterile saline and is administered as a single dose epidural injection at the lumbar level prior to surgery (or after clamping of the umbilical cord during caesarean section). The recommended dose is 10 mg for caesarean section, 10-15 mg for lower abdominal surgery and 15 mg for major orthopedic surgery of the lower extremities. Some patients may benefit from a dose of 20 mg. It should be appreciated that as with all opioids the incidence of serious adverse respiratory events is dose-related. Respiratory depression is the chief hazard of all opioid preparations and occurs more frequently in elderly or debilitated patients. For elderly patients (age>65 years), the low end of the dosing range for DepoDur(TM) is recommended together with vigilant peri-operative monitoring. On 16 September 2003 the FDA formally accepted for filing a New Drug Application ("NDA") for DepoDur(TM), which had been submitted on 18 July 2003. On 20 November 2003 SkyePharma submitted an application for DepoDur(TM) to the UK Medicines and Healthcare products Regulatory Agency ("MHRA"). After national approval in the UK, SkyePharma intends to seek approval in other European Union countries under the Mutual Recognition procedure. SkyePharma has licensed DepoDur(TM) to Endo for North America and to Zeneus Pharma for Europe. About DepoFoam(TM) DepoFoam(TM) is SkyePharma's proprietary extended-release injectable delivery technology. This is fully commercialized and approved by regulatory agencies in both the USA and Europe. DepoFoam(TM) consists of lipid-based particles containing discrete water-filled chambers dispersed through the lipid matrix. The particles are 10-30 microns in diameter and are suspended in saline. The suspension resembles skimmed milk and can be injected through a fine needle. The water-filled chambers containing active drug account for most of the weight of the particles. The lipids are naturally occurring substances (or close analogues) such as phospholipids and triglycerides. The small amount of lipid is cleared rapidly in the body as the particles deliver their drug payload over a period that can be modified from 1 to 30 days. About post-operative pain After a major surgical operation, the level of pain is usually very high for the first one to two days but the intensity of pain gradually subsides and by the end of the second day pain can normally be satisfactorily controlled with oral analgesics. For the immediate post-operative period, opioid analgesics like morphine (used alone or in combination with other non-opioid analgesics) are likely to remain the "gold standard" for relief of severe acute pain. However the relatively short duration of pain relief with opioids means that they require either continuous infusion or patient-controlled analgesia ("PCA") in which a pump delivers a series of doses of a short-acting opioid analgesic in response to the patient pressing a button (under computer control to prevent over-dosing). Both of these approaches require the patient to have an in-dwelling epidural or intravenous catheter. Such catheters can fall out or interfere with patient mobility and are a potential source of infections. Epidural catheters are also contra-indicated with concomitant use of anticoagulants because of the risk of bleeding in the spinal column that can potentially result in paralysis. There is a growing trend toward routine use of anticoagulants in patients undergoing orthopedic surgery in order to prevent the formation of blood clots. Except for the historical information herein, the matters discussed in this news release include forward-looking statements that may involve a number of risks and uncertainties. Actual results may vary significantly based upon a number of factors, which are described in SkyePharma's 20-F and other documents on file with the SEC. These include without limitation risks in obtaining and maintaining regulatory approval for existing, new or expanded indications for its products, other regulatory risks, risks relating to SkyePharma's ability to manufacture pharmaceutical products on a large scale, risks that customer inventory will be greater than previously thought, risks concerning SkyePharma's ability to manage growth, SkyePharma's marketing partners' ability to market a pharmaceutical product on a large scale and manage their sales and marketing organization and maintain or expand sales and market share for its products, risks relating to the ability to ensure regulatory compliance, risks related to the research, development and regulatory approval of new pharmaceutical products, risks related to research and development costs and capabilities, market acceptance of and continuing demand for SkyePharma's products and the impact of increased competition, risks associated with anticipated top and bottom line growth and the possibility that upside potential will not be achieved, competitive products and pricing, and risks associated with the ownership and use of intellectual property rights. SkyePharma undertakes no obligation to revise or update any such forward-looking statement to reflect events or circumstances after the date of this release. DATASOURCE: SkyePharma PLC CONTACT: Michael Ashton, Chief Executive Officer, Peter Laing, Director of Corporate Communications, +44-207-491-1777, or Sandra Haughton, US Investor Relations, +1-212-753-5780, all of SkyePharma PLC; or Tim Anderson, or Mark Court, both of Buchanan Communications, +44-207-466-5000, for SkyePharma PLC Web site: http://www.skyepharma.com/

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