RESEARCH TRIANGLE PARK, NC - October 16, 1997 - Quintiles Transnational Corp. (Nasdaq: QTRN) today announced the opening of an office in Mexico City to provide clinical trials services throughout Mexico. Quintiles currently is managing clinical trials in Mexico and four other countries in Latin America.

The office will be operated under a wholly owned subsidiary, Quintiles Mexico, S. de R.L. de C.V., and managed by Cristina Torres Leon, M.D. Dr. Torres was the founder and general manager of CT Consultoria Farmaceutica, the leading contract research organization (CRO) in Mexico. Dr. Torres has extensive experience in regulatory affairs and clinical trial management.

"Mexico is one of the promising countries in the expanding Latin American market for pharmaceutical development," said Dennis Gillings, Ph.D., Chairman and Chief Executive Officer of Quintiles Transnational Corp. "We're delighted to have secured the expertise and management skills of Dr. Torres to lead our operations in Mexico."

The Mexico City office currently has 10 employees providing clinical trial monitoring, regulatory assistance and marketing consultation services. The office is located at Guty Cardenas Number 121-201, Col. Guadalupe Inn, Mexico City. Phone/fax: 52 5 662 1413 or 52 5 662 7080. Quintiles has more than 30 staff members managing clinical trials in Mexico, Brazil, Chile, Uruguay and Argentina.

Prior to founding Consultoria Farmaceutica in 1994, Dr. Torres was head of clinical research for Hoechst Mexico. She obtained both her medical degree and diploma in clinical pharmacology from the Universidad Nacional Aut¢noma de Mexico.

Quintiles Transnational Corp. is the market leader in providing full-service contract research, sales and marketing services to the worldwide pharmaceutical, biotechnology and medical device industries, and provides healthcare policy consulting and health information management services to the healthcare industry. Quintiles is headquartered near Research Triangle Park, North Carolina, and has more than 8,500 employees in 69 operating units in 25 countries.