Final answer:
SSRIs, psychotherapy, and certain antipsychotics are prescribed for OCD and sometimes BPD. Electroconvulsive therapy is used less commonly and mainly for severe depression in these conditions. Deep-brain stimulation is an emerging treatment for OCD, while blood pressure medications are typically for comorbid cardiovascular issues, not directly for psychiatric disorders.
Step-by-step explanation:
For each potential provider's prescription, we must match the therapy to whether it is expected for obsessive-compulsive disorder (OCD), dementia, or borderline personality disorder (BPD). The referenced therapies such as blood pressure medication, antipsychotics, psychotherapy, electroconvulsive therapy, deep-brain stimulation, and/or selective serotonin reuptake inhibitors (SSRIs) can be associated with several psychiatric conditions, but not all are typical for each listed disorder.
The use of SSRIs is commonly associated with OCD, as they can help reduce the symptoms by balancing serotonin levels. Psychotherapy, especially cognitive-behavioral therapy (CBT), is also a mainstay treatment for OCD and can be beneficial for patients with BPD. Certain classes of antipsychotics may be prescribed for BPD as well as for behavioral and psychotic symptoms of dementia. Electroconvulsive therapy may be used in severe cases of depression that may accompany OCD or BPD, and less commonly for severe depression in dementia if it's refractory to other treatments. Blood pressure medications are not typically prescribed for these psychiatric conditions unless there is a comorbid cardiovascular issue. Deep-brain stimulation is an emerging treatment for OCD but is not standard for dementia or BPD.