MiddleBrook Pharmaceuticals, Inc. (Nasdaq: MBRK) (formerly Advancis) is a pharmaceutical company focused on developing and co ... mmercializing anti-infective products that fulfill unmet medical needs. MiddleBrook currently markets KEFLEX®, the immediate-release brand of cephalexin, and MOXATAG® – the first and only FDA-approved once-daily amoxicillin. read more