Barbara is a married 39-year-old woman with no children, smokes 1 pack/day, and weighs 180 pounds who has scheduled an appointment with you to discuss feelings of anhedonia that she has been experiencing for the past few months. She has a history of depression as a teenager, but has not needed or received therapy for ~20 years. At the appointment, she relays that she has been experiencing chronic fatigue/loss of energy, feelings of worthlessness, appetite disturbances, weight gain, inability to concentrate, psychomotor disturbances, and insomnia.
Please provide a list of differential diagnoses, as well as an indication of your primary diagnosis.
Once this has been completed, please indicate and describe your chosen pharmacological treatment with inclusion of dose and mechanism of action of your chosen prescription.