| abstract |
To provide a depot capable of easily forming a depot and capable of maintaining a depot state for a long period as required, and, when containing a drug, providing a depot for sustaining the drug for a long period after administration into the body. The present invention relates to a depressant containing trialkyl citrate and / or acetyltrialkyl citrate, wherein the alkyl groups each of the trialkyl citrate and the acetyltrialkyl citrate are the same or different, . |