Looks like a resubmission of their weight loss drug:
"Arena Pharma receives FDA notice of advisory committee meeting for Lorcaserin
Arena Pharmaceuticals and Eisai announced that the U.S. FDA has notified Arena that an Endocrinologic and Metabolic Drugs Advisory Committee meeting to discuss the lorcaserin New Drug Application, or NDA, resubmission will be held in Q2 of 2012. Confirmation and details of the meeting will be published in the Federal Register. Arena resubmitted the lorcaserin NDA in December 2011, and the FDA assigned a new Prescription Drug User Fee Act, or PDUFA, target date of June 27, 2012. :theflyonthewall.com"