Callisto Announces Adjournment of Special Meeting

1/3/2013 4:31 PM EST

Callisto Pharmaceuticals Inc.
Press release

Callisto Announces Adjournment of Special Meeting

NEW YORK, 2013-01-03 22:31 CET (GLOBE NEWSWIRE) -- Callisto Pharmaceuticals,
Inc. (OTCBB:CLSP) ("Callisto") today announced that it convened its special
meeting of stockholders on Thursday, January 3, 2013 and adjourned the meeting
until Monday, January 14, 2013, at 1:00 p.m., Eastern Standard Time. The
special meeting was adjourned to allow the company's stockholders a reasonable
amount of time to consider the recent announcement, by Synergy Pharmaceuticals
Inc., of the results of its Phase IIb/III clinical trial. 

The reconvened special meeting will be held at Callisto's offices, 420
Lexington Avenue, Suite 1609, New York, NY 10170. Stockholders who have already
voted do not need to recast their votes. Proxies previously submitted in
respect of the meeting will be voted at the adjourned meeting unless properly
revoked. Given the adjournment, proxies may now be received by our registrar
and transfer agent, Philadelphia Stock Transfer Inc., no later than January 13,
2013 at 11:59 p.m. (Eastern Standard Time). 

About Callisto Pharmaceuticals Inc.

Callisto is a development stage biopharmaceutical company. All of Callisto's
drug candidates, currently plecanatide and SP-333 to treat GI disorders and
diseases, are being developed exclusively by Synergy Pharmaceutical Inc. 


         CONTACT: Investor Contact:
         Danielle Spangler
         The Trout Group
          
         (646) 378-2924