To: Anthony Wong who wrote (370 ) 6/19/1998 11:20:00 PM From: Anthony Wong Respond to of 1722
FDA move on Pfizer's Zeldox raises red flags Friday June 19, 6:11 pm Eastern Time By Ransdell Pierson NEW YORK, June 19 (Reuters) - The U.S. Food and Drug Administration's ''non-approvable'' letter for Pfizer Inc's (PFE - news) candidate drug for schizophrenia, Zeldox, will likely delay its launch by at least six months and raises concern about the medication's future, analysts said. Pfizer said Friday afternoon it had received a non-approvable letter from the federal agency for Zeldox, an antipsychotic which some analysts had expected to be approved this month. Pfizer expected the drug garner annual sales of $200 million to $600 million within four years. Pfizer gave no explanation of what information the FDA might have requested or whether the agency had cited concerns about the safety or effectiveness of Zeldox also known as ziprasidone. But analysts said the wording of Pfizer's statement strongly hinted the agency was seeking another clinical trial of the drug. ''We believe that the additional studies and analyses suggested by the FDA can be undertaken in a relatively short period, and that we will be able to advance the application accordingly,'' Pfizer's research chief Dr. John Niblack said in the statement released mid-afternoon. ''We are obviously disappointed at this development, but remain confident of the safety and efficacy of Zeldox,'' Niblack said, referring to the FDA letter. Pfizer said it remained committed to launching the drug in the U.S. and abroad and planned to meet with the FDA to discuss related issues, ''including the possible submission of additional data, as suggested by the FDA,'' the Pfizer statement said. Pfizer spokesman Andrew McCormick later said the company, perhaps best known for its blockbuster impotence pill, Viagra, approved in March, would not comment further on the FDA letter. ''The non-approvable letter is a big shock, although it is still unclear exactly what it means,'' said New Jersey independent drug analyst Hemant Shah. Shah said the agency sends such letters sometimes for minor, technical problems with a drug approval application but sometimes to express potentially serious regulatory hurdles. ''The non-approvable letter means the data the FDA has now is not sufficient for Zeldox to be approved. And it sounds like the FDA wants another clinical trial,'' said Mario Corso, a Boston-based pharmaceuticals analyst for ABN-AMBRO Securities. ''A new trial would take up to a year,'' said Corso, who described1Zeldox as a ''fairly important drug'' in the New York-based company's pipeline. He said he had projected Zeldox sales of $60 million in 1998, rising to $600 million by 2001. Corso added Zeldox, if approved, would compete with Johnson & Johnson's (JNJ - news) Risperdal and with Eli Lilly's (LLY - news) Zyprexa, an antipsychotic with 1997 sales of $730 million. Hambrecht & Quist drug analyst Alex Zisson said he had projected Zeldox annual sales of $500 million three or four years after launch, far short of the $1 billion annual sales needed to qualify as a modern-day blockbuster drug. Zisson said if the FDA simply wanted a clarification of existing Zeldox data, which he called the ''best-case scenario,'' the drug could face a marketing delay of six to nine months. ''But if a new trial is needed, you're talking at least six months to run the trial and another six months for the FDA to approve the drug,'' he added. Pfizer in March won FDA approval for Viagra, the world's first impotence pill. It has been perhaps the fastest selling drug in history -- chalking up over two million prescriptions. Although 16 men have died after taking Viagra, the FDA and Pfizer said no deaths were linked directly to the drug. biz.yahoo.com