AVITAR, INC. moves to the American Stock Exchange.

March 07, 2000

CANTON, MA, March 7, 2000 – Avitar, Inc. (NASDBB: AVIT.OB) announced today that its application for listing on the American Stock Exchange has been approved. Effective today, Avitar, Inc. will begin trading on the American Stock Exchange (AMEX) under the symbol: AVR.

"Our move to the American Stock Exchange from the OTC BB represents an important step for us. Coupled with the recent successful introductions of our proprietary ORALscreen™ and ORALconfirm™ drug test products, trading on the AMEX will greatly increase visibility for our company," said Peter P. Phildius, chief executive officer and chairman of Avitar.

The American Stock Exchange, a subsidiary of the National Association of Securities Dealers, Inc. (NASD), is the nation’s second largest floor-based exchange and is a leader in developing innovative products to meet the increasingly complex needs of market participants. The NASD is the largest securities industry self-regulatory organization in the United States and the parent organization of the Nasdaq-Amex Market Group Inc. and NASD Regulation Inc.

Avitar, Inc. (AMEX: AVR) headquartered in Canton, Massachusetts develops, manufactures and markets innovative medical devices based on core technologies in oral fluid diagnostics and customized polyurethane applications. The company markets a unique portfolio of substance abuse testing products and services that includes the first point-of-contact rapid oral fluid screening device for drugs of abuse. Avitar also markets an oral fluid collection system for DNA testing as well as a proprietary line of polyurethane-based high tech medical devices. For more information, see Avitar’s Web Site at avitarinc.com.

This release forward looking statements that are subject to risks and uncertainties, including the development and marketing of new applications that are detailed from time to time in the Company’s filings with the Securities and Exchange Commission.