Just a thought I had.... One of the main tenets of psychodynamic therapies is the experiences that exploring your past phenomena brings, requiring participants to be able to engage with difficult topics emotionally. Antidepressant use has been indicated to reduce the magnitude of depressed emotions.
One of the most robust findings in mental health is that people improve substantially more if they undertake both psychological therapies and medication for symptom control, than either treatment alone. However, psychoanalytical approaches are not well suited to research; they are exploratory and will be very different individually for each participant. But I wonder whether for these more probing therapies the outcome may be different?