FOR MORE INFORMATION: Company Contact: Jacqueline Lemke Interim President & CEO and CFO Phone: 765.497.5829 jlemke@BASinc.com Agency Contact: Neil Berkman Berkman Associates Phone: 310.477.3118 info@berkmanassociates.com

Announces Extension of Mortgage Maturity

IN - November 9, 2012 -- Bioanalytical Systems, Inc. (NASDAQ:BASI) announced today that it has negotiated a six month

extension, until May 2013, on the maturity of its $5,787,000 mortgage that was originally scheduled to mature this month.

extension enhances our flexibility as we complete BASi's restructuring and build a healthy business model for the future,"

said Interim President & CEO and CFO Jacqueline Lemke.

streamlining of our locations has improved capacity utilization while allowing us to continue providing the high quality services

and instruments our clients expect from BASi. We are focused on taking advantage of our competitive strengths - specialty

assay and discovery capabilities, a long history of regulatory excellence, and our market-changing Culex automated in vivo

sampling system - and we are optimistic about the outlook for fiscal 2013."

to announce audited financial results for fiscal 2012 on December 20, 2012.

About Bioanalytical Systems,

a pharmaceutical development company providing contract research services and monitoring instruments to the world's leading drug

development companies and medical research organizations. The company focuses on developing innovative services and products that

increase efficiency and reduce the cost of taking a new drug to market. Visit www.BASinc.com for more about BASi.

release contains forward-looking statements that are subject to risks and uncertainties including, but not limited to, risks and

uncertainties related to changes in the market and demand for our products and services, the development, marketing and sales of

products and services, changes in technology, industry standards and regulatory standards, and various market and operating risks

detailed in the company's filings with the Securities and Exchange Commission.