I'm breastfeeding my two week old. i'm add, if i take my vyvanse (lisdexamfetamine) 70mg (nursing) how long will it hit my breastmilk and long do i need to dump till gon?

Mainly 10-12 hours: Vyvanse (lisdexamfetamine) is present in small quantities in breast milk, and not enough studies have been done to prove safety, but generally found not to be harmful. Nurse just before taking meds and then discard for the next 10-12 hours to minimize all exposure. In addition, there may be a small effect on milk production, which may be a problem when just building milk supply. See http://www.infantrisk.com/forum/showthread.php?1661-Vyvanse (lisdexamfetamine)