FREEZE-DRIED PREPARATION CONTAINING METHYLCOBALAMIN AND PROCESS FOR PRODUCING THE SAME

摘要

The present invention provides a freeze-dried preparation containing a high content of methylcobalamin which is highly stable over time and can be used in high-concentration methylcobalamin therapy. Disclosed is the freeze-dried preparation containing methylcobalamin or a pharmacologically acceptable salt thereof and an excipient wherein the excipient is at least in an amorphous state. The freeze-dried preparation according to the present invention is characterized in that when the excipient comprises a sugar and a sugar alcohol, the excipient in the amorphous state is contained in an amount of at least 20% by weight, based on the total weight of the sugar and the sugar alcohol.