I have been on Vyvanse 70mg, for 5 years. It was prescribed to me to counteract the side effects of the Zyprexa I was taking. In October of 2017 I quit taking Zyprexa for good and immediately started losing weight, I’m pretty sure due to the Vyvanse. I’m still taking Vyvanse, now down to 50mg. My doctor and I decided on a rapid taper plan starting at 50mg now, and getting down to 0 in 4 to 6 weeks. What withdrawal symptoms should I feel, and how long do they last?