my new psychiatrist nurse practitioner has prescribed me vyvanse chewables( i have a hard time swallowing pills) im also already on effexor xr 225mg. im always worried about the side effects of meds. the psychiatrist said it could cause some increased anxiety and insomnia but it should go away. i ask the pharmacist who said i may also get some stomach pain.(im on another med too for esophagitis. has anyone taken both vyvanse for adhd and effexor for anxiety at the same time?