MINNEAPOLIS,CIMA Labs disclosed Friday morning that a series of class action lawsuits have been filed by “purported holders” of CIMA stock regarding its proposed merger with aaiPharma of Wilmington, NC.

CIMA said the suits were without merit and stood by its commitment to merge with aaiPharma even though Cephalon, another pharmaceutical firm, came forward with a slightly higher bid. The lawsuits seek to prevent the merger, CIMA said in a statement.