This disclosure provides systems and methods for the production of formulations of active pharmaceutical ingredients (APIs). In some embodiments, the disclosure provides an automated medicine formulation system comprising a portable and self-contained API formulating apparatus where the API and excipients are formulated to make a drug product meeting drug quality and safety specifications. The automated formulation system produces liquid formulations including, for example, injectable and intravenous medicines. The systems are capable of producing a plurality of individual sterile injectable doses of drug comprising a specific API and excipient(s), which can be formulated on demand in a GMP and FDA acceptable manner.