According to the text, drug therapy seems to be of minimal effectiveness for those suffering from schizoid personality disorder, as explained below.
The schizoid personality disorder is type of of disorder characterized by lack in social interactions and difficulty in expressing emotions or reacting to others.
This type of personality disorder is not responsive to treatment with drugs. However, as it can be accompanied by other problems, such as depression or anxiety, drugs can be used to treat these issues.
Therefore, the best way to complete the sentence is:
Learn more about schizoid personality disorder here:
https://brainly.com/question/27449579
#SPJ4