hi lauri. vyvanse is long acting (extended release). if you are like me, you like to sleep in on the weekends. I found taking one instant release adderall to do well as needed on the weekends. the dosage was 1/2 of the vyvanse dose. it is just enough for myself. everyone is different. ssris affect everyone differently so you can try it but if the suicidal aspect worsens talk to your therapist. you may need a mood stabilizer instead. good luck