To: John F. Dowd who wrote (7830 ) 6/9/1999 3:27:00 PM From: Anthony Wong Respond to of 9523
Pfizer Relabels Antibiotic Trovan for Serious Infections PR Wire June 9, 1999, 12:16 p.m. PT NEW YORK, June 9 /PRNewswire/ -- Pfizer Inc (NYSE: PFE) said today it will be notifying prescribing physicians to limit the use of Trovan(R) (trovafloxacin) tablets and intravenous formulation to certain serious infections. This action follows discussions with the U.S. Food and Drug Administration regarding the agency's interpretation of spontaneous adverse event reports of rare serious hepatic events associated with Trovan observed in post-marketing surveillance. More than 2.5 million prescriptions have been written for Trovan, which was introduced in February 1998. Pfizer has received reports of 140 cases of hepatic adverse events worldwide from February 1998 through early May, all of which have been submitted to regulatory authorities. "The spontaneous adverse event reporting system is helpful in identifying rare adverse events, but data derived from these reports cannot be used exclusively to draw conclusions about a product's risk-benefit profile," said Joe Feczko, M.D., Pfizer's senior vice president of worldwide medical operations and regulatory affairs. "We have a difference of opinion with the agency over the interpretation of these data and the regulatory action being taken," he said. "Pfizer believes that this risk assessment requires additional scientific evaluation and analysis in order to provide physicians with the proper clinical guidance to use Trovan safely and effectively. Trovan has unique therapeutic advantages that are not shared by other commonly used antibiotics, and the degree of risk associated with Trovan use is not markedly different when compared with other widely used antibiotics such as penicillins," Dr. Feczko said. "The decreased mortality seen with Trovan versus comparative agents in controlled clinical trials would have been expected to result in the savings of a substantial number of lives based on prescribing to date," he added. Pfizer is continuing to collect medical information and conduct additional analyses to further understand the incidence of these events. The company will continue to work collaboratively with the FDA to ensure Trovan's appropriate use. "While these analyses continue, Pfizer believes it prudent and responsible to voluntarily limit the use of Trovan to serious in-patient infections where Trovan has an important role," Dr. Feczko said. "We will be widely communicating this new information about Trovan to the medical community, wholesalers and pharmacists as quickly as possible." Pfizer noted that these serious hepatic events were too rare to be observed among the approximately 7,000 Trovan patients in the clinical trials, which were among the largest ever conducted for an anti-infective medicine. Many of the severe hepatic cases reported appear to be due to a hypersensitive (allergic) type reaction. Additional medical factors, such as underlying illnesses and the use of other medications, may also have contributed to the reported liver problems. Pfizer vigilantly monitors the safety and use of all its medicines and shares this information with regulators and prescribers worldwide. Pfizer is in discussion with regulators outside the U.S. regarding Trovan relabeling and product utilization. Pfizer Inc is a research-based global pharmaceutical company that discovers, develops, manufactures and markets innovative medicines for humans and animals. The company reported revenues of more than $13.5 billion in 1998 and expects to spend about $2.8 billion on research and development this year. In 1999, Pfizer celebrates its 150th anniversary. SOURCE Pfizer Inc -0- 06/09/99 /CONTACT: Andy McCormick, 212-573-1226, or Mariann Caprino, 212-733-5686, both of Pfizer/ /Company News On-Call: Pfizer's press releases are available at no charge through PR Newswire's Company News On-Call fax service and on PRN's Web Site. For a menu of Pfizer press releases or to retrieve a specific release, call 800-758-5804, extension 688250, or prnewswire.com on the Internet./ /Photo: A free corporate logo to accompany this story is available immediately via Wieck Photo Database to any media with telephoto receiver or electronic darkroom, PC or Macintosh, that can accept overhead transmissions. To retrieve a logo, please call 972-392-0888./ /Web site: pfizer.com