<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 36-year-old man comes to the clinic for follow-up of his general anxiety disorder. He was diagnosed a year ago for excessive worry and irritability and was subsequently started on paroxetine. He demonstrated great response to therapy but is now complaining of decreased libido, which is affecting his marriage and quality of life. He wishes to switch to a different medication at this time. Following a scheduled tapering of paroxetine, the patient is started on a different medication that is a partial agonist of the 5-HT1A receptor. Which of the following is the most likely drug that was prescribed?? A: Amitriptyline, B: Buspirone, C: Diazepam, D: Duloxetine, E: Phenelzine,  <response>: The patient was originally treated with paroxetine, an SSRI antidepressant, for general anxiety disorder. He responded well but developed sexual side effects. He now wants to switch medications. The new medication prescribed is described as a partial agonist of the 5-HT1A receptor. Buspirone is a partial agonist of the 5-HT1A receptor and is commonly used as an anxiolytic medication with less sexual side effects compared to SSRIs like paroxetine. Amitriptyline is a tricyclic antidepressant and does not act on 5-HT1A. Diazepam is a benzodiazepine anxiolytic but does not act on 5-HT1A. Duloxetine is an SNRI antidepressant and phenelzine is an MAOI antidepressant - neither act on 5-HT1A.B: Buspirone 