Long-actng injection. It is the delivery of a medication into a fat deposit by injection that slowly releases medication into the body over one to four weeks generally. It is often a psychiatric medication or a hormone. It an sometimes an important mode of delivery to effectively treat certain conditions under certain circumstances. Do not get the picture of an institutionalized person being forced to be medicated.
Long-acting. These medications are injected into the deltoid or gluteal muscles. They replace the need to take the medication on a daily basis. They typically last anywhere from 2 to 4 weeks, depending upon the particular antipsychotic formulation utilized.