In clinical trials of lubiprostone (24 mcg twice daily vs. placebo; N=1113 vs. N=316) in patients with Chronic Idiopathic Constipation (CIC), the most common adverse reactions (incidence > 4%) were nausea (29% vs. 3%), diarrhea (12% vs. <1%), headache (11% vs. 5%), abdominal pain (8% vs. 3%), abdominal distension (6% vs. 2%), and flatulence (6% vs. 2%).In clinical trials of lubiprostone (8 mcg twice daily vs. placebo; N=1011 vs. N=435) in patients with Irritable Bowel Syndrome with Constipation (IBS-C), the most common adverse reactions (incidence > 4%) were nausea (8% vs. 4%), diarrhea (7% vs. 4%), and abdominal pain (5% vs. 5%). Reduce the dosage in CIC patients with moderate and severe hepatic impairment. Reduce the dosage in IBS-C patients with severe hepatic impairment. About Sucampo Pharmaceuticals, Inc. Sucampo Pharmaceuticals, Inc., an international pharmaceutical company is focused on the discovery, development and commercialization of proprietary drugs based on prostones. The therapeutic potential of prostones, which occur naturally in the human body as a result of enzymic (15-PGDH) transformation of certain fatty acids, was first identified by Ryuji Ueno, M.D., Ph.D., Ph.D., Sucampo Pharmaceuticals’ Chairman and Chief Executive Officer. Dr. Ueno founded Sucampo Pharmaceuticals in 1996 with Sachiko Kuno, Ph.D., founding Chief Executive Officer and currently Advisor, International Business Development, and a member of the Board of Directors. For more information, please visit www.sucampo.com. AMITIZA is a registered trademark of Sucampo Pharmaceuticals, Inc. RESCULA is a registered trademark of R-Tech Ueno, Ltd., and has been licensed to Sucampo. Forward-Looking Statement This press release contains “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements are based on management’s current expectations and involve risks and uncertainties, which may cause results to differ materially from those set forth in the statements. The forward-looking statements may include statements regarding product development, product potential, future financial and operating results, and other statements that are not historical facts. The following factors, among others, could cause actual results to differ from those set forth in the forward-looking statements: the impact of pharmaceutical industry regulation and health care legislation; Sucampo’s ability to accurately predict future market conditions; dependence on the effectiveness of Sucampo’s patents and other protections for innovative products; the risk of new and changing regulation and health policies in the US and internationally and the exposure to litigation and/or regulatory actions.