I'm Having VNG Testing Done. One Of The Things I'm

I'm having VNG Testing done. One of the things I'm being told to do prior to the test is to stop Tranquilizers and antidepressants 48 hours prior to the test. I currently take Quetiaping 100mg in pm, Duloxetine DR 60mg in am, and lamotrigine 100mg am. Will there be any major problems with stopping these medications 48 ours prior to the test. The physican that percribed these is out of town for 2 weeks. Thanks