During that time you may need more support than usual. You may need more, longer, and more frequent contact with the doctor. You need to perservere You should be made aware that side effects may increase or decrease. Doctor may switch you faster or slower depending on how process is going. A big problem with switching meds is that many people give up to soon on switching.
Patients start to 'chicken out' when they get nervous or a slight increase in symptoms.
The doc should review with patients the cross over protocol. The doc and patient should expect misunderstandings to arise and should schedule more frequent visits. Were expectations for the result of the switch too high. What else is going on that might be affecting compliance. If the crossover works and the individual starts to feel better, many issues have to be addressed.