Could be massive dilution. $23 million is 37% of market cap.
This from business wire:
"Zalicus has the right, at its sole discretion, over a period of two years to sell up to an additional $23.0 million in shares of its common stock to Lincoln Park under the terms set forth in the agreement. Zalicus will control the timing and amount of any common stock sales to Lincoln Park. The agreement may be terminated by Zalicus at any time, at its sole discretion, without any cost or penalty. "