Cerecor Inc., of Baltimore, said the units issued in its recent IPO will separate. Each unit consists of one share of common stock of the company, one class A warrant to purchase one additional share of common stock and one class B warrant to purchase one-half additional share of common stock. The class A and class B warrants will trade separately on Nasdaq under the symbols CERCW and CERCZ, respectively, with the common stock trading under the symbol CERC.