FOR IMMEDIATE RELEASE
                                                           ---------------------

                  Information Holdings Inc. ANNOUNCES MERGER OF
                     Subsidiary WITH AND INTO Liquent, Inc.

     Stamford, CT, December 28, 2001 - Information Holdings Inc. announced today
that the anticipated merger of Fluid Acquisition Corp., a wholly owned
subsidiary of Information Holdings Inc. (NYSE: IHI), with and into Liquent, Inc.
became effective on December 27, 2001. As a result of the merger, Liquent, Inc.
(NASDAQ: LQNT) has become a wholly owned subsidiary of Information Holdings Inc.

     Because Fluid Acquisition Corp. previously had acquired more than 90% of
the common stock of Liquent, Inc. pursuant to a cash tender offer completed on
December 19, 2001, the merger was effected without a meeting of the stockholders
of Liquent, Inc. Upon the effectiveness of the merger, each outstanding share of
common stock of Liquent, Inc. was converted, subject to appraisal rights, into
the right to receive $2.27 in cash, without interest.

     A notice of the merger, as well as a letter of transmittal to be used by
the holders of common stock of Liquent, Inc. in exchanging their shares for the
merger consideration, will be mailed promptly by EquiServe Trust Company, NA,
the depositary for the merger.

     Information Holdings Inc. also announced today that, as a result of the
merger, Nasdaq will delist the common stock of Liquent, Inc. and will apply to
the Securities and Exchange Commission to deregister the common stock under the
federal securities laws.

About Information Holdings Inc.
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     Information Holdings Inc. is a leading provider of information products and
services to scientific, technical, medical, intellectual property and IT
learning markets. Through its Intellectual Property Group, which includes
MicroPatent(R), Master Data Center(TM), Liquent, IDRAC(R) and LPS Group, IHI
provides a broad array of databases, information products and complementary
services for intellectual property and regulatory professionals. IHI is
recognized as a leading provider of intellectual property information over the
Internet. IHI's CRC Press(R) business publishes professional and academic books,
journals, newsletters and electronic databases covering areas such as life
sciences, environmental sciences, engineering, mathematics, physical sciences
and business. IHI's Transcender(R) unit is a leading online provider of IT
certification test-preparation products. Its products include exam simulations
for certifications from major hardware and software providers.

     The statements in this press release, which are not historical facts, are
forward-looking statements. These forward-looking statements involve risks and
uncertainties that could render them materially different. Forward-looking
statements are typically statements that are preceded by, followed by or include
the words "believes," "plans," "intends," "will," "expects," "anticipates," or
similar expressions. Actual results may differ materially from the results
predicted, and reported results should not be considered as an indication of
future performance. These forward-looking statements involve risks and
uncertainties that could render them materially different. More information
about factors that could potentially affect IHI's financial results is included
in IHI's filings with the SEC, including its quarterly report on Form 10-Q for
the quarter ended September 30, 2001, and its Annual Report on Form 10-K for the
year ended December 31, 2000. The forward-looking information in this release
reflects management's judgment only on the date of this press release. IHI
undertakes no responsibility to publicly update the forward-looking statements
contained in this press release.

For more information, contact:
Vincent A. Chippari






Information Holdings Inc.
203-961-9208
vchippari@informationholdings.com