Fentora

Treatment for Pain

Cephalon Receives Approvable Letter for Fentora (fentanyl buccal tablet) for Management of Breakthrough Pain in Patients with Cancer

FRAZER, Pa., June 29, 2006 -- Cephalon, Inc. announced today that it has received an approvable letter from the U.S. Food and Drug Administration (FDA) for Fentora (fentanyl buccal tablet) [C-II]. The company submitted a new drug application (NDA) in August 2005, seeking to market Fentora for the treatment of breakthrough pain in opioid-tolerant patients with cancer.

"We are pleased with FDA's response and are working closely with the agency to secure final approval of this important new medication," said Dr. Paul Blake, Executive Vice President, Worldwide Medical and Regulatory Operations. "We believe Fentora will extend the leadership position of Cephalon in the development of innovative medications for the management of breakthrough pain in patients with cancer."

Cephalon intends to submit a response to the FDA by the end of July. The company expects the FDA to classify this response as a Class I resubmission under which the FDA will seek to complete its review within 60 days of the resubmission. FDA has indicated that no additional safety or efficacy data are required and that the labeling has been essentially finalized.

Fentora is specifically designed to manage breakthrough pain, a common component of chronic pain that can be characterized by its intensity, rapid onset, and relatively short duration. The medication is a simple-to- administer sugar-free, fentanyl buccal tablet that can be discretely placed between a patient's upper cheek and gum (buccal cavity). Its proprietary OraVescent(R) technology uses an effervescent reaction to produce transient shifts in pH levels in the area surrounding the tablet which is thought to enhance the rate and extent of fentanyl absorption through the buccal mucosa. The OraVescent technology permits rapid and efficient delivery of the majority of the medication directly into the bloodstream.

The NDA submission for Fentora included data from 13 clinical studies. The pivotal double-blind, placebo-controlled, variable-dose study assessed the safety and efficacy of Fentora in adult patients with breakthrough pain who were already receiving opioid medication for treatment of their moderate-to- severe cancer pain. In the pivotal study, Fentora provided clinically significant decreases in pain intensity and greater pain relief in as little as 15 minutes. The Phase 3 safety and efficacy studies demonstrate that Fentora was generally well tolerated. The most common adverse effects observed were typical of those seen with opioids and in patients with cancer being treated with chemotherapy, including nausea, dizziness, headache, fatigue, vomiting, and somnolence. The most serious adverse events associated with all opioids are respiratory depression (potentially leading to apnea or respiratory arrest), circulatory depression, hypotension, and shock. All patients should be followed for symptoms of respiratory depression. Opioid side effects should be expected and managed accordingly.

On a separate matter, Barr Laboratories, Inc. has invoked its option under the license and supply agreement with the company to have Cephalon manufacture for it a generic version of ACTIQ(R) (oral transmucosal fentanyl citrate) [C- II]. Cephalon expects to deliver bulk units to Barr, and Barr will be responsible for all packaging and labeling of the product.

Breakthrough Pain

Approximately 50 million Americans suffer from chronic pain, a condition that consists of two distinct components: persistent pain, which is pain that is continuous throughout the day, and breakthrough pain, which is a transitory flare of moderate-to-severe pain in patients with otherwise stable persistent pain. Breakthrough pain can reach peak intensity in as little as three minutes and typically lasts for 30 to 60 minutes. It may occur during a specific activity, spontaneously with no apparent cause, or when the dose of the persistent pain medicine wears off. An estimated 64 percent of all cancer patients treated for persistent pain - and up to 74 percent of patients treated for persistent pain from other conditions such as low back pain, diabetic neuropathy, and osteoarthritis - will experience breakthrough pain. Breakthrough pain can have a profound impact on an individual's physical and psychological well being. It can increase the economic burden on both patients and the healthcare system.

Source: Cephalon, Inc.

Posted: June 2006

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